TY  - GEN
AU  - Hayer, Herbert Kendall
AU  - Inmer, Forrest Rhinehart
AU  - Smith, David Clyde
TI  - Methods of plant breeding
U1  - 631.53 HAY 
CY  - New York, Mc Graw- Hill Book Company Inc
KW  - Plant breeding-methods/heterosis/seed production
ER  -