TY  - JA
AU  - Richey,F.D.
TI  - Experiments on hybrid vigor and convergent improvement in corn
PY  - 1931///
CY  - Washington, DC (USA)
PB  - USDA
KW  - AGROVOC
KW  - Experimentation
KW  - Hybrids
KW  - Improvement
KW  - Maize
T2  - United States Department of Agriculture Washington D.C technical Bulletin
ER  -