TY  - BOOK
AU  - Roth, L. O. and Field, H. L.
TI  - An introduction to agricultural engeneering : A problem solving approach
SN  - 0412069911
AV  - S675. 6 . 1991 
PY  - 1991///
CY  - New york
PB  - Chapman and hall
KW  - Agricultural engeneering
ER  -