Modelling crop-weed interactions / Kropff, M. J. Laar, H. H. van C.A.B. International International Rice Research Institute Crops Weeds Plant competition Crops Weeds Plant competition 633 CAB 1993 A039 Or. Wallingford : CAB International, in association with the International Rice Research Institute, c1993 c1993 Text xvi, 274 p. :