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1. Before 1957  (147,159)
2. 1957 To 1973  (66,087)
3. 1974 To 1990  (181,198)
4. 1991 To 2008  (497,747)
5. After 2008  (699,307)
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New Records 

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4. Reviews  (23,998)
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Subject 

1. Science & Technology  (835,916)
2. Physical Sciences  (764,494)
3. Physics  (426,709)
4. Astronomy & Astrophysics  (426,002)
5. Exact Sciences And Technology  (230,570)
6. Physics And Astronomy  (214,976)
7. Astronomy  (212,940)
8. Earth, Ocean, Space  (150,497)
9. Physics, Particles & Fields  (108,871)
10. Technology  (99,082)
11. Space And Planetary Science  (95,140)
12. General Physics And Astronomy  (92,770)
13. Astrophysics  (83,156)
14. Physics, Multidisciplinary  (75,770)
15. Physics, Applied  (75,466)
16. Astronomy And Astrophysics  (68,680)
17. Elementary Particles  (53,886)
18. Stars  (52,443)
19. Quantum Field Theory  (50,272)
20. Science & Technology - Other Topics  (48,526)
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Author/Creator 

1. Houziaux, Léo  (18)
2. National Research Council (U.S.)  (12)
3. Board on Physics and Astronomy  (11)
4. Division on Engineering and Physical Sciences  (8)
5. National Research Council  (7)
6. National Research Council (U.S.). Astronomy and Astrophysics Survey Committee  (4)
7. National Research Council Staff  (3)
8. Solid State Sciences Committee  (2)
9. Board on Life Sciences  (2)
10. Commission on Physical Sciences, Mathematics, and Applications  (2)
11. Division on Earth and Life Studies  (2)
12. National Research Council (U.S.). Committee on Condensed-Matter and Materials Physics  (1)
13. Proud, Joseph M  (1)
14. National Research Council (U.S.). Panel on Plasma Processing of Materials  (1)
15. National Research Council (U.S.). Physics Survey Overview Committee  (1)
16. Plasma Science Committee  (1)
17. Astronomy and Astrophysics Survey Committee  (1)
18. Committee on Forefronts of Science at the Interface of Physical and Life Sciences  (1)
19. Committee on Research at the Intersection of the Physical and Life Sciences  (1)
20. United States  (1)
21. National Research Council (U.S.). Committee on Gravitational Physics  (1)
22. Panel on Neutron Scattering  (1)
23. National Research Council (U.S), Committee on the Organization and Management of Research in Astronomy and Astrophysics Staff  (1)
24. Findlay,,J. W  (1)
25. von Hoerner,S  (1)
26. Nuclear Physics Panel, Physics Survey Committee, Board on Physics and Astronomy  (1)
27. Moran, James M  (1)
28. National Research Council (U.S.). Committee on Research at the Intersection of the Physical and Life Sciences  (1)
29. Panel on Atomic, Molecular, and Optical Physics, Physics Survey Committee, Board on Physics and Astronomy, National Research Council  (1)
30. Houziaux, Léo  (1)
31. Committee on Astronomy and Astrophysics, Board on Physics and Astronomy, Space Studies Board, National Research Council  (1)
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Databases 

1. ProQuest Central  (563,480)
2. DOAJ Directory of Open Access Journals  (405,076)
3. ROAD: Directory of Open Access Scholarly Resources  (313,457)
4. Institute of Physics Open Access Journal Titles  (218,616)
5. Wiley-Blackwell AGU Digital Library  (132,207)
6. Free E- Journals  (130,547)
7. Wiley Online Library Open Access  (128,312)
8. HighWire Press (Free Journals)  (114,204)
9. Oxford Journals Open Access Collection  (83,188)
10. Springer Open Access  (74,347)
11. EDP Open  (69,524)
12. Geneva Foundation Free Medical Journals at publisher websites  (44,162)
13. PubMed Central  (38,069)
14. Hyper Article en Ligne (HAL) (Open Access)  (34,181)
15. arXiv.org  (32,145)
16. JSTOR Early Journal Content  (32,114)
17. NASA Technical Reports Server  (32,097)
18. MEDLINE  (31,921)
19. Ebook Central - Academic Complete  (30,321)
20. Open Access: Nature Open Access  (25,737)
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Language 

1. English  (1,572,299)
2. Japanese  (246,199)
3. German  (38,107)
4. French  (7,771)
5. Russian  (5,607)
6. Chinese  (5,312)
7. Korean  (3,204)
8. Italian  (2,024)
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10. Portuguese  (1,449)
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12. Latin  (727)
13. Hebrew  (455)
14. Dutch  (448)
15. Polish  (281)
16. Turkish  (239)
17. Arabic  (206)
18. Czech  (194)
19. Catalan  (167)
20. Croatian  (97)
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Journal Title 

1. arXiv.org  (30,530)
2. Astronomische Nachrichten  (88,210)
3. Astronomy  (31,068)
4. Astronomy And Astrophysics  (62,884)
5. Journal Of Geophysical Research  (94,690)
6. Monthly Notices Of The Royal Astronomical Society  (82,732)
7. Physics Letters. B  (37,862)
8. The Astronomical Journal  (33,264)
9. The Astrophysical Journal  (143,773)
10. The Journal Of High Energy Physics  (31,991)
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