Professional biologists who have kindly consented to our use of their un- 

 published findings include: 



Alabama: Dr. Maurice F. Baker of this Bureau and Mr. Dan W. Speake, 

 Leader and Assistant Leader, respectively, of the Alabama Cooperative Wildlife 

 Research Unit, and various of their graduate students, including Messrs. 

 Sterling G. Clawson and George Matschke, who studied (partly under contract 

 with the Bureau) the effects of 20 pounds of 10^ heptachlor granules on wild- 

 life in Wilcox County; and Mr. Ralph Allen and his associates, of the Alabama 

 Department of Conservation, who observed the effects of 20 pounds of 10^ 

 heptachlor granules in Autauga County and other counties. Escambia County 

 studies were by Mr. Walter Rosene, Jr. and Montgomery County studies were by 

 Dr. Paul A. Stewart, both of the Bureau's pesticide-wildlife staff. 



Arkansas: Messrs. Harold E. Alexander, Clyde Goddard, and Sam Gooden, 

 of the State Game and Fish Commission, who supplied reports on the wildlife 

 effects of 20 pounds of 105^ heptachlor granules as used in the fire ant pro- 

 gram in Union County; and Mr. W. P. Boyer, entomologist at the Agricultural 

 Experiment Station, University of Arkansas, who furnished a summary of a study 

 of insects in hibernation in treated and untreated fire ant areas in Union 

 County. 



Florida: Mr. Donald D. Strode, of the Game and Fresh Water Fish Commis- 

 sion, who furnished reports on the effects of 20 pounds per acre of 105^ 

 heptachlor granules as used in the fire ant program in Jefferson County. 



Georgia: Dr. James H. Jenkins, of the University of Georgia, who super- 

 vised the studies of Mr. Curtis Wilson and furnished reports on the wildlife 

 effects of 20 pounds per acre of lO/ls heptachlor granules in Decatur County, 

 and of the results of pen tests at the University. The extensive quail cen- 

 suses in Decatur County were taken by Mr. Walter Rosene, Jr., of the Bureau's 

 pesticide-wildlife staff. 



Louisiana: Dr. Leslie L. Glasgow, of Louisiana State University, who 

 conducted studies, partly under contract with the Bureau, of the effects of 

 20 pounds per acre of 10^ heptachlor granules as used in the imported fire ant 

 control program on various vertebrate and invertebrate populations in Acadia, 

 West Baton Rouge, Concordia, St. Landry, Iberville, and Vermillion Parishes; 

 and Mr. John D. Newsom, of Louisiana Wild Life and Fisheries Commission, who 

 studied the effects of heptachlor on wildlife in Concordia Parish. 



Massachusetts: Dr. William G. Sheldon of this Bureau and Leader of the 

 Massachusetts Cooperative Wildlife Research Unit, and Mr. Wendell B. Dodge, 

 who furnished, under contractual arrangement with the Bureau, a report of the 

 effects of DDT, heptachlor, and dieldrin on penned woodcock. 



Michigan: Professor George J. Wallace, of Michigan State University, who 

 studied (partly under contract with the Bureau) the effects of DDT as used in 

 Dutch elm disease control on birds in 1 sprayed and 1 unsprayed community. 



