TY  - BOOK
AU  - Lockhsrt, J.A.R..
TI  - Introduction to cr,op husbandry / 
SN  - 0-08- 022653-1
U1  - J.56 
PY  - 1992///
CY  - New York : 
PB  - Pergamon Press , 
KW  - Agriculture<Photosynthesis>
ER  -