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Creation Date 

1. Before 1957  (199,931)
2. 1957 To 1973  (141,258)
3. 1974 To 1990  (378,914)
4. 1991 To 2008  (2,380,939)
5. After 2008  (5,044,538)
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New Records 

1. New From Last Week  (5,435)
2. New From Last Month  (24,399)
3. New From Last 3 Month  (77,722)
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Resource Type 

1. Articles  (6,102,777)
2. magazinearticle  (628,023)
3. Reviews  (246,172)
4. Book Chapters  (216,711)
5. Reports  (145,922)
6. Newspaper Articles  (145,834)
7. Patents  (134,913)
8. Thesises (postgraduate)  (105,080)
9. Books  (72,946)
10. Government Documents  (65,752)
11. Conference Proceedings  (45,647)
12. Drawing/Maps  (39,601)
13. Web Resources  (36,417)
14. Datasets  (36,104)
15. Newsletter Articles  (31,737)
16. Images  (26,856)
17. References  (22,078)
18. Journals  (19,140)
19. Text Resources  (11,708)
20. Archival Material / Manuscripts  (6,802)
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Subject 

1. Science & Technology  (2,748,836)
2. Life Sciences & Biomedicine  (1,949,111)
3. Humans  (1,222,835)
4. Social Sciences  (792,367)
5. Female  (736,211)
6. Male  (653,007)
7. Physical Sciences  (529,189)
8. Adult  (468,302)
9. Studies  (438,514)
10. Technology  (424,066)
11. Middle Aged  (391,990)
12. Biological And Medical Sciences  (343,793)
13. Environmental Sciences & Ecology  (303,741)
14. Surveys  (292,576)
15. Aged  (286,223)
16. Surveys And Questionnaires  (270,519)
17. Public, Environmental & Occupational Health  (266,216)
18. Analysis  (262,750)
19. Adolescent  (244,098)
20. Risk Factors  (239,849)
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Author/Creator 

1. Weinstein, Maxine  (81)
2. Young, Mike  (45)
3. Stephens, Thomas  (24)
4. Polisena, Julie  (15)
5. Drewes, Torben  (7)
6. National Research Council (U.S.)  (6)
7. Division of Behavioral and Social Sciences and Education  (4)
8. Committee on Population  (4)
9. Committee on National Statistics  (3)
10. Vaupel, James W  (2)
11. KODAK Capture software  (2)
12. Daley, William  (2)
13. Weinstein, Maxine  (2)
14. Buckley, Neil J  (2)
15. Hauser, Robert Mason  (2)
16. Boothby, Daniel  (2)
17. National Research Council Staff  (2)
18. Dillman, Don A  (1)
19. Wunderlich, Gooloo S  (1)
20. Young, Mike  (1)
21. Polisena, Julie  (1)
22. Savoie, L  (1)
23. West, Kirsten K  (1)
24. Sinclair et al. 2003  (1)
25. Fagt, Sisse; Gunnarsdottir, Ingibjörg; Hallas-Møller, Torben; Halldorsson, Thorhallur Ingi; Helldán, Anni; Knutsen, Helle Katrine; Lillegaard, Inger Therese L.; Lindroos, Anna Karin; Mikkilä, Vera; Ov  (1)
26. Drewes, Torben  (1)
27. Coordinating Committee on Evaluation of Food Consumption Surveys, Food and Nutrition Board, National Research Council  (1)
28. Panel on Collecting, Storing, Accessing, and Protecting Biological Specimens and Biodata in Social Surveys  (1)
29. Stephens, Thomas  (1)
30. Shin, Justin  (1)
31. Thornhill, Beverley  (1)
32. Lurette, Donald  (1)
33. Scanlan, Terri M  (1)
34. Board on International Comparative Studies in Education, Andrew C. Porter and Adam Gamoran  (1)
35. Lurette, Donald  (1)
36. Daley, William  (1)
37. Fricker Jr, Ronald D  (1)
38. Boothby, Daniel  (1)
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Databases 

1. ProQuest Central  (5,135,879)
2. DOAJ Directory of Open Access Journals  (1,819,144)
3. ROAD: Directory of Open Access Scholarly Resources  (1,517,987)
4. MEDLINE  (1,416,512)
5. Geneva Foundation Free Medical Journals at publisher websites  (1,175,983)
6. PubMed Central  (1,134,395)
7. ProQuest One Psychology  (465,922)
8. Springer Open Access Journals  (329,287)
9. HighWire Press (Free Journals)  (269,044)
10. Open Access Journals  (214,049)
11. Ebook Central - Academic Complete  (190,964)
12. Open Access: Wiley-Blackwell Open Access Journals  (186,776)
13. US Government Documents  (127,257)
14. Education Resources Information Center (ERIC)  (120,655)
15. esp@cenet  (112,791)
16. IOP_英国物理学会OA刊  (108,450)
17. PLoS  (107,750)
18. HathiTrust Digital Library Full View Worldwide  (89,258)
19. ERIC - Full Text Only (Discovery)  (86,642)
20. Coronavirus Research Database  (86,084)
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Language 

1. English  (7,863,297)
2. Japanese  (379,735)
3. Chinese  (148,481)
4. Portuguese  (72,134)
5. French  (57,118)
6. Spanish  (41,969)
7. German  (36,411)
8. Korean  (18,459)
9. Norwegian  (16,669)
10. Croatian  (12,852)
11. Russian  (12,499)
12. Czech  (10,937)
13. Persian  (8,562)
14. Polish  (6,532)
15. Swedish  (6,227)
16. Turkish  (6,178)
17. Italian  (4,760)
18. Indonesian  (4,130)
19. Bokmål, Norwegian  (3,846)
20. Arabic  (2,500)
21. Catalan  (2,316)
22. Hebrew  (160)
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Journal Title 

1. Arxiv.Org  (48,692)
2. International Journal Of Environmental Research And Public Health  (34,977)
3. Nature  (28,291)
4. New York Times  (93,712)
5. Plos One  (91,189)
6. Scientific Reports  (29,752)
7. Survey Of Current Business  (42,834)
8. Sustainability  (40,309)
9. The Astrophysical Journal  (35,423)
10. The Washington Post  (31,170)
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