Sowers, G. F., & Sally, H. L. (1962). Earth and rockfill dam engineering. Asia Pub. House.
Dyfyniad Arddull ChicagoSowers, George F., and Hari Lai Sally. Earth and Rockfill Dam Engineering. Bombay, New York: Asia Pub. House, 1962.
Dyfyniad MLASowers, George F., and Hari Lai Sally. Earth and Rockfill Dam Engineering. Asia Pub. House, 1962.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.