TY  - GEN
AU  - David clyde
AU  - Hayes, Herbert Kendall
AU  - Immer Forrestrhinehast, Smith
TI  - Methods of plant breeding
T2  - Mc graw-hill publications in the agricultural science series
U1  - 631.53 HAY 
CY  - New York, Mc GRaw- Hill Book Company Inc
KW  - Plant breeding
ER  -