Sharma, S., & Karmacharya, A. P. S. (1991). Water quality testing in Ilam.
Dyfyniad Arddull ChicagoSharma, Sapana, and Amresh Prasad Shrestha Karmacharya. Water Quality Testing in Ilam. 1991.
Dyfyniad MLASharma, Sapana, and Amresh Prasad Shrestha Karmacharya. Water Quality Testing in Ilam. 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.