TY  - GEN
AU  - Forrest, Rhinehart
AU  - Hayes, Herbert
AU  - Kendall, Immer
AU  - Smith, David Clyde
TI  - Methods of plant breeding
U1  - 631.  53 HAY 
CY  - Newyork, Mc GRaw- Hill Book Company Ltd.
KW  - Plant breeding-methods/heterosis
ER  -