Michael, A., & Khepar, H. (1989). Water well and pump engineering. TMH.
Dyfyniad Arddull ChicagoMichael, A.M, and H.D Khepar. Water Well and Pump Engineering. New Delhi: TMH, 1989.
Dyfyniad MLAMichael, A.M, and H.D Khepar. Water Well and Pump Engineering. TMH, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.