TY  - BOOK
AU  - Heady,Earl Orel
AU  - Vocke,Gary
TI  - Economic models of agricultural land conservation and environmental improvement 
SN  - 0813805236 
U1  - 333.761  20
PY  - 1992///
CY  - Ames
PB  - Iowa State University Press
KW  - Soil conservation
KW  - Agricultural conservation
N1  - Includes bibliographical references and index
ER  -