@book{101768,
	title = {A study on the effect of infestation os Mustard Aphid, Lipaphis Erysimi Kaltenbach on the growth and yield of Mustrd / },
	publisher = {University Of Dhaka, },
	year = {1976.},
	address = {Dhaka : },
	note = {Thesis (MS )-- Department of Zoology, University of Dhaka,1976.}
}