TY  - GEN
AU  - Kipps, M S
AU  - Wolfe, T K
TI  - Production of Field Crops: a text book of Agronomy
U1  - 633 WOL 
CY  - New York, Mc Graw Hill Book Company Inc.
KW  - Crop Production -Economical aspects/ Sending Practices/ Crop Rotation/ Grassland Farming
ER  -