TY  - BOOK
AU  - Person,Philip H.
AU  - Retka,Robert L.
AU  - Woodword,J.Arthur
ED  - United States.
TI  - Technical papers: a method for estimating herion use prevalence 
U1  -  639.20973 
PY  - 1977///
CY  - Washington, D.C.
PB  - U.S. Government Printing Office
KW  - Fishery technology
KW  - United States
KW  - Fish-culture
ER  -