00445nam a22001217a 4500008004100000040005500041080002200096245009700118260006800215300001000283650001300293653001700306230606b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aR 016:631/635bL7  aInternational bibliography on cropping systems 1975c/ International Rice Research Institute  aPhilippines: bInternational Rice Research Institute,    c1977  a239p.  aLanguage  aBibliography