Eco-biological studies of the toxic effects of an iron factory effluents on the molluscan community of freshwater wetland ecosystem of Midnapore district, West Bengal, India /

By Bhattacharya, Nandan.. Midnapore : Vidyasagar University , 2004 . 10 ,235p. : , Document represents Ph.D Thesis 29cm . .

Research methodology for social sciences /

By Acharyya, Rajat . London: Routledge, 2020 . xv,268p., 24cm.. 9780367463922