00259nam a2200097Ia 4500080001900000100001800019245007200037260002500109300001000134583001700144  a12.06.01 C9482  aCropper, John  aDevelopment and application of indigenous technology : final report  b[s.n.]a[S.l.]c1990  a46 p.  c7/6/07kJOYD