The New Encyclopaedia Britannica, Volume 23Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 219
... pesticide accumulation problems 14 : 143c pesticide effect on predator and bird 5 : 59f ⚫plankton as a primary aquatic producer 14 : 495h plankton as vital link 7 : 347b plankton's economic value 5 : 41b polar biotic components 14 ...
... pesticide accumulation problems 14 : 143c pesticide effect on predator and bird 5 : 59f ⚫plankton as a primary aquatic producer 14 : 495h plankton as vital link 7 : 347b plankton's economic value 5 : 41b polar biotic components 14 ...
Page 220
... pesticides necessary to high crop yield 14 : 142c pest losses annually 14 : 139d plant disease losses in the U.S. 5 : 880c ⚫rodent grain consumption problem 15 : 969h sea cow food source theory 16 : 810h Subarctic Indian food ...
... pesticides necessary to high crop yield 14 : 142c pest losses annually 14 : 139d plant disease losses in the U.S. 5 : 880c ⚫rodent grain consumption problem 15 : 969h sea cow food source theory 16 : 810h Subarctic Indian food ...
Page 972
... pesticide vector control , development expense , and results 14 : 139e statistical record - keeping history 8 : 695h therapy cost and earning deficit in speech disorders 17 : 486d ⚫work injury and accident costs 16 : 138g Health and ...
... pesticide vector control , development expense , and results 14 : 139e statistical record - keeping history 8 : 695h therapy cost and earning deficit in speech disorders 17 : 486d ⚫work injury and accident costs 16 : 138g Health and ...
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