TY  - BOOK
AU  - Johnson D Gale
AU  -  Gustafson Robert L
TI  - Grain yields and the american food supply :  An ana   
U1  - X9(J38).73.N6, K2 
PY  - 1962///
CY  - Chocago
PB  - University of chicago press       
KW  - Fruits
ER  -