TY  - BOOK
AU  - Martin, J.H.
AU  - Leonard, W.H.
AU  - Stamp, D.L.
TI  - Principles and practices used in field crop production
SN  - 0023767200
PY  - 1940///
CY  - Collier Macmillan International Editions. 
PB  - London
KW  - Agriculture
ER  -