TY  - BOOK
AU  - Smith,Richard A., 1945-
AU  - Alexander,Richard B.
AU  - Wolman,M.Gordon
ED  - United States
TI  - Analysis and interpretation of water-quality trends in major U. S. rivers, 1974-81
U1  - 551.483 
PY  - 1987///].
CY  - [Washington]: 
PB  - [United States Government printing office], 
KW  - Water quality
KW  - United States
KW  - Water chemistry
KW  - Rivers
N1  - Includes bibliographical references (p. 22-25)
ER  -