TY - BOOK ED - Irrigation Research Institute TI - Pvc tubewells performance durability & efficiency T2 - IRR-491/Phy/T.W.131 Ist Report U1 - 530 PVC 1984 PY - 1984/// CY - Lahore PB - Irrigation Research Institute; KW - Physics KW - Report N1 - Constructional characteristics; Geohydrological data; Aquifer characteristics ER -