TY - PRO AU - Pfeiffer,W.H. AU - Braun,H.J. TI - Yield stability in bread wheat PY - 1989/// KW - Yield factors KW - Triticum aestivum KW - AGROVOC KW - Wheat KW - Yields N1 - Tables, graphs T2 - Variability in Grain Yields: Implications for Agricultural Research and Policy in Developing Countries ER -