Annual Fish Passage Report - Rock Island Dam 

 Columbia River, Washington, 1963 



By Paul D. Zimmer and John H. Broughton 



Marine Biological Laboratory 



LIBRARY 



APR 2 2 1965 

 WOODS HOLE, MASS. 



SPECIAL SCIENTIFIC REPORT- FISHERIES No. 500 



UNITED STATES DEPARnflENTjOJr^j^lN^^ 



FISH AND WILDLIFE SERVICE 



