TY  - BOOK
AU  - Willrich,Ted L.
AU  - Smith,George E.
TI  - Agricultural practices and water quality
SN  - 0813817455
PY  - 1970///
CY  - Ames
PB  - Iowa State University Press
KW  - Water
KW  - Pollution
KW  - Agriculture
N1  - Includes bibliographies
ER  -