00473nam a2200145Ia 4500008004100000040001700041082002400058100002300082110003300105245007000138250000800208260003800216300001700254650005600271190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta628.21bP311S  aPathak, Bindeshwar  aSulabh International (Patna) 0aSulabh shauchalayaba study of directed changecBindeshwar Pathak  a4th  aPatnabSulabh Internationalc1986  aix, 150p+map  aSewerage; Sewage tanks; Cities and towns-Sanitation