TY  - JA
AU  - Duvick,D.N.
TI  - Genetic diversity in major farm crops on the farm and in reserve
SN  - 0013-0001
U1  - 85-095276 
PY  - 1984///
KW  - Plant breeding
KW  - AGROVOC
N1  - Includes references
T2  - Economic Botany
ER  -