00518nam a2200157 a 450000500170000000800410001702000150005804100080007310000220008124500730010326400300017630000110020694200070021799900170022495201190024120260717072138.0260701s1989    ii            000 0 eng d  a047021192X  aeng1 aHay, Robert K. M.13aAn introduction to the physiology of crop yield /cHay, Robert K. M. 1aHarlow :bLongman,c1989.  a292 p.  cBK  c11274d11274  001040708JCaBKBCLbBKBCLd1991-03-30g490.80l0o633 HAYpJC12232r2026-07-16 12:51:20v490.80w2026-07-16yBK