TY  - BOOK
AU  - Willrich Ted L Ed.
AU  -  Smith George E Ed.
TI  - Agricultural practices and water qulity
SN  - 0813817455
U1  - X9(J):(G:555), L0 
PY  - 1970///
CY  - Iowa
PB  - Iowa State University        
KW  - Agriculture Labour
N1  - Bib chapterwise
ER  -