TY - PRO AU - Wellhausen,E.J. AU - Roberts,L.M. TI - Methods used and results obtained in corn improvement in Mexico PY - 1949/// KW - Breeding KW - AGROVOC KW - Methods KW - Mexico KW - Zea mays KW - Yields N1 - Abstract in Spanish, illustrations, tables T2 - Research Bulletin Plant Research in the Tropics ER -