TY  - BOOK
AU  - NELSON, Randall L
TI  - Evaluation of the USDA soybean germplasm collection : Maturity groups OOOto 4(PI273.483to PI427.107)
U1  - 633.34 E81 
PY  - 1987///
KW  - SOYBEAN
KW  - GERMPLASM RESOURCES
ER  -