UNITED STATES DEPARTMENT OF THE INTERIOR 

 U.S. Fish and Wildlife Service 



BUREAU OF commercial FISHERIES 



Zooplankton Volumes Off the 

 Pacific Coast, 1960 



By 

 JAMES R. THRAILKILL 



United States Fish and Wildlife Service 

 Special Scientific Report--Fisheries No. 581 



Washington, D.C. 

 March 1969 



