00329nam a2200109Ia 450000500170000008000200001710000190003724500830005626000470013930000140018658300190020020260716043948.0  a07.04.01 R336na  aNarayan, C. V.  aPerspectives and experiences : agricultural machinery research and development  bCommonwealth Secretariata[London]GBc1991  a9, [8] p.  c10/29/09kJOYD