TY  - BK
ED  - American Society of Agricultural Engineers (USA). National Symposium on Conservation Systems. Chicago, Ill. (USA). 1987
TI  - Optimum erosion control at least cost:  proceedings of the National Symposium on Conservation Systems, December 14-15, 1987, Hyatt RegDEy Chicago in Illinois Center
T2  - ASAE publication
SN  - 09-161-50895
U1  - 89-125146 
PY  - 1987///
CY  - St. Joseph, MI (USA)
PB  - Published by American Society of Agricultural Engineers, 
KW  - Conservation
KW  - Injurious factors
KW  - Resource conservation
KW  - Soil conservation
KW  - Soil management
N1  - ill. bibliographies
ER  -