00416nam a2200133Ia 450000500170000008000200001710000180003724501160005526000470017130000140021858300190023294200140025199900170026520260716043949.0  a07.04.01 R336hu  aHudson, Colin  aIndigenous agricultural mechanization : developing tractor-powered agricultural machinery in a tropical country  bCommonwealth Secretariata[London]GBc1991  a25 leaves  c10/30/09kJOYD  cMmR336hu  c57726d57726