@book{25658,
	author = {Biswas, S.B.   and Biswas, Amit},
	title = {An introduction to viruses/by S.B. Biswas and Amit Biswas},
	publisher = {Vikas Publishing House,},
	year = {1996.},
	address = {New Delhi:},
	edition = {4th.rev.ed.}
}