TY  - BOOK
AU  - Ashton, T.
TI  - The use of heterosis in the production of agricultural and horticult ural crops
U1  - 631.523 
PY  - 1946///
CY  - Cambridge
PB  - Imperial bureau of plant breeding and genetics, Schoo l of agriculture
KW  - Plant breeding
KW  - Hybridization, Vegetable
ER  -