TY - BK AU - Smith,E.L. TI - Genetic improvement in yield of wheat T2 - CSSA Special Publication SN - 0-89118-523-2 U1 - 633.11 PY - 1987/// CY - Madison, WI (USA) PB - CSSA, KW - Disease resistance KW - AGROVOC KW - Germplasm conservation KW - Production KW - Triticum aestivum KW - Wheat KW - Yields KW - Plant breeding N1 - Illustrations, tables, graphs ER -