UNITED STATES DEPARTMENT OF THE INTERIOR, Fred A. Seaton, Secretary 

 FISH AND WILDLIFE SERVICE, Arnie J. Suomela, Commissioner 



GRAYLING OF GREBE LAKE, YELLOWSTONE 

 NATIONAL PARK, WYOMING 



By Thomas E. Kruse 





FISHERY BULLETIN 149 



From Fishery Bulletin of the Fish and Wildlife Service 



VOLUME 59 



UNITED STATES GOVERNMENT PRINTING OFFICE 



WASHINGTON 



1959 



For sale by the Superintendent of Documents, U. S. Government Printing Office 

 Washington 25, D. C. Price 35 cents 



