(1920). Journal of institution of engineers (India): Environmental engineering division. Institution of engineers.
Dyfyniad Arddull ChicagoJournal of Institution of Engineers (India): Environmental Engineering Division. India: Institution of engineers, 1920.
Dyfyniad MLAJournal of Institution of Engineers (India): Environmental Engineering Division. Institution of engineers, 1920.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.