00450nam a22001217a 4500008004100000040005500041080002200096245010200118260006800220300001000288650001300298653001700311230606b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aR 016:631/635bL8  aInternational bibliography on cropping systems 1973-1974c/ International Rice Research Institute  aPhilippines: bInternational Rice Research Institute,    c1978  a239p.  aLanguage  aBibliography