@book{57455,
	title = {Isolation and characterization of aspergillus niger mutants fof higher yields of citric acid from cane molasses /},
	publisher = {University Of Dhaka, },
	year = {1973.},
	address = {Dhaka : },
	note = {Thesis (MS )-- Department of Botany, University of Dhaka, 1973.}
}