Diatoms as indicators of stream quality in the Kathmandu Valley and Middle Hills of Nepal and India, Júttner, I,; Subodh Sharma,; Dahal, B, M.; Ormerod, S, J.; Chimonides, P, J.; Cox, E, J. , Freshwater Biology, Volume 48, Number 11, p.2065-2084, (2003) Abstract