TY  - BOOK
AU  - Nazir Ahmad
TI  - Tubewell theory and practice
T2  - Monograph (Pakistan Academy of Sciences), no. 4
U1  - 621.86 TUB 1979 
PY  - 1979///
CY  - Lahore
PB  - Ripon printing press
KW  - Wells
ER  -