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Creation Date 

1. Before 1958  (18,946)
2. 1958 To 1973  (118,415)
3. 1974 To 1989  (618,204)
4. 1990 To 2006  (3,050,187)
5. After 2006  (6,220,215)
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New Records 

1. New From Last Week  (500)
2. New From Last Month  (13,188)
3. New From Last 3 Month  (47,323)
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Resource Type 

1. Articles  (8,614,223)
2. magazinearticle  (726,731)
3. Reviews  (274,186)
4. Newsletter Articles  (132,912)
5. Conference Proceedings  (65,445)
6. Book Chapters  (54,433)
7. Books  (44,714)
8. Reports  (27,627)
9. Patents  (21,722)
10. Datasets  (17,437)
11. Newspaper Articles  (15,170)
12. Thesises (postgraduate)  (12,927)
13. References  (3,753)
14. Images  (3,376)
15. Text Resources  (3,185)
16. Web Resources  (1,495)
17. Government Documents  (990)
18. Videos  (292)
19. Archival Material / Manuscripts  (255)
20. Journals  (131)
21. Drawing/Maps  (72)
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Subject 

1. Science & Technology  (5,700,315)
2. Life Sciences & Biomedicine  (4,444,283)
3. Humans  (2,004,974)
4. Animals  (1,310,826)
5. Biological And Medical Sciences  (1,210,694)
6. Environmental Sciences & Ecology  (1,127,702)
7. Male  (1,053,472)
8. Female  (1,032,622)
9. Physical Sciences  (1,001,738)
10. Environmental Sciences  (907,298)
11. Science & Technology - Other Topics  (736,007)
12. Fundamental And Applied Biological Sciences. Psychology  (701,339)
13. Multidisciplinary Sciences  (594,865)
14. Adult  (559,028)
15. Technology  (554,762)
16. Medical Sciences  (552,268)
17. Middle Aged  (477,263)
18. Ecology  (475,866)
19. Biochemistry & Molecular Biology  (463,844)
20. Microbiology  (457,039)
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Author/Creator 

1. National Research Council Staff  (1)
2. Guaraglia, Dardo Oscar  (1)
3. Imran Ahmad Dar; Mithas Ahmad Dar  (1)
4. Committee on Grand Challenges in Environmental Sciences  (1)
5. Pousa Jorge Lorenzo  (1)
6. National Research Council (U.S.)  (1)
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Databases 

1. ProQuest Central  (6,846,822)
2. MEDLINE  (3,497,412)
3. Geneva Foundation Free Medical Journals at publisher websites  (2,399,923)
4. DOAJ Directory of Open Access Journals  (2,210,341)
5. PubMed Central  (1,940,052)
6. ROAD: Directory of Open Access Scholarly Resources  (1,713,596)
7. HighWire Press (Free Journals)  (904,232)
8. Springer_OA刊  (438,306)
9. ProQuest One Psychology  (397,778)
10. Wiley Online Library Open Access  (357,535)
11. Public Library of Science  (332,812)
12. JSTOR Early Journal Content Free  (216,914)
13. Nature出版集团开放获取期刊  (171,440)
14. Hyper Article en Ligne (HAL) (Open Access)  (153,662)
15. Institute of Physics Open Access Journal Titles  (131,323)
16. IngentaConnect Backfiles  (127,052)
17. Coronavirus Research Database  (106,115)
18. IOPscience (Open Access)  (104,321)
19. Oxford Academic Journals (Open Access)  (96,819)
20. Journals@Ovid Open Access Journal Collection Rolling  (91,559)
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Language 

1. English  (9,844,203)
2. Japanese  (966,223)
3. French  (80,158)
4. Portuguese  (63,459)
5. Chinese  (52,806)
6. German  (37,324)
7. Spanish  (34,649)
8. Russian  (9,481)
9. Czech  (8,244)
10. Norwegian  (5,702)
11. Polish  (4,837)
12. Italian  (4,389)
13. Swedish  (4,325)
14. Slovak  (4,265)
15. Croatian  (3,147)
16. Dutch  (1,700)
17. Turkish  (1,521)
18. Slovenian  (1,232)
19. Ukrainian  (1,145)
20. Lithuanian  (1,142)
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Journal Title 

1. Farmers Weekly  (72,120)
2. Iop Conference Series: Earth And Environmental Science  (97,223)
3. Iop Conference Series. Earth And Environmental Science  (110,127)
4. Nature  (119,790)
5. Plos One  (299,925)
6. Proceedings Of The National Academy Of Sciences - Pnas  (113,593)
7. Protoview  (86,074)
8. Scitech Book News  (71,868)
9. Sustainability  (80,008)
10. The Lancet  (120,599)
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