TY  - BOOK
TI  - Variability in Grain yields : Implications for Agricultural Research and Policy in developing Countries 
SN  - 0801837936
AV  - FASS HD 9049 .W5V37 
PY  - 1984///
CY  - London
PB  -  The John Hopkins University press
KW  - Wheat Trade -Developing Countries -Seasonal Variations
ER  -