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主題 

1. Environmental Sciences  (31)
2. Agriculture, Forestry and Wildlife  (13)
3. Agriculture, Soil Science  (12)
4. Biology, Botany  (7)
5. Climate change  (7)
6. Biology, Oceanography  (6)
7. Biology, Limnology  (6)
8. Biology, Plant Physiology  (5)
9. Biology, Microbiology  (5)
10. Geochemistry  (3)
11. Physics, Atmospheric Science  (3)
12. Agriculture, Range Management  (3)
13. Water Resource Management  (3)
14. Engineering, Environmental  (2)
15. Biology, Zoology  (1)
16. Environmental geology  (1)
17. Agriculture, General  (1)
18. Paleontology  (1)
19. Atmospheric chemistry  (1)
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著者 

1. Stanford University  (8)
2. Boston University  (6)
3. Oregon State University  (5)
4. University of California, Berkeley  (3)
5. University of Colorado at Boulder  (3)
6. University of Virginia  (3)
7. Princeton University  (3)
8. University of Michigan  (2)
9. University of Maryland, College Park  (2)
10. Dartmouth College  (2)
11. University of Montana  (2)
12. Duke University. Ecology  (2)
13. Colorado State University  (2)
14. University of Florida  (2)
15. University of Minnesota  (2)
16. Trent University (Canada)  (2)
17. Blankinship, Joseph C  (1)
18. University of Massachusetts Boston. Envronmental Sciences/Environmental, Earth and Ocean Sciences  (1)
19. Talhelm, Alan F  (1)
20. Bartleson, Richard Dixon  (1)
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建立日期 

1. 之前1998  (3)
2. 1998到2002  (18)
3. 2003到2005  (29)
4. 2006到2009  (20)
5. 之後 2009  (26)
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