TY  - BOOK
AU  - Smith,Richard A.
AU  - Alexander,Richard B.
AU  - Wolman,Markley Gordon
TI  - Analysis and interpretation of water-quality trends in major U.S. rivers, 1974-81
T2  - U.S. Geological Survey water-supply paper
AV  - TD223 .S65 1987
U1  - 363.7/3942/0973 19
PY  - 1987///
CY  - Washington
PB  - GPO
KW  - Water quality
KW  - United States
KW  - Water chemistry
KW  - Rivers
N1  - Bibliography: p. 22-25
ER  -