WATER BEETLES IN RELATION TO PONDFISH CUL- 

 TURE, WITH LIFE HISTORIES OF THOSE FOUND IN 

 FISHPONDS AT FAIRPORT, IOWA : By Charles Branch Wilson 



From BULLETIN OF THE BUREAU OF FISHERIES, Vol. XXXIX, 1923-24 

 Document No. 955 ; ; ; ; ; ; : ; '; ; ; ; ; ; ; ; ; ; ; ; ; 



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Sold only by the Superintendent of Documents, Govenunent Printing OflBce, Washington, D. C. 



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1923 



