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1
Pesticides in the soil environment: processes, impacts, and..
Soil Science Society of America book series, no. 2
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2
Annual report of the Board of Regents of the Smithsonian In..
United States congressional serial set ; serial set no. 2266;Mis. doc. / 48th Congress, 2nd session. Senate ; no. 33, pt. 1 & 2
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3
Annual report of the Board of Regents of the Smithsonian In..
United States congressional serial set ; serial set no. 2246;Mis. doc. / 48th Congress, 1st session. House ; no. 69
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4
Annual report of the Board of Regents of the Smithsonian In..
United States congressional serial set ; serial set no. 2121;Mis. doc. / 47th Congress, 2nd session. House ; no. 26
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5
Annual report of the Board of Regents of the Smithsonian In..
United States congressional serial set ; serial set no. 1994;Mis. doc. / 47th Congress, 1st session. Senate ; no. 109