@book{11893,
	author = {DAS, B.C.,},
	title = {HIGHER TRIGONOMETRY},
	publisher = {U.N.DHAR & SONS},
	year = {1933},
	address = {KOLKATA},
	note = {Do9nated by Paran Bhuyan, Melachakar, Sibsagar on 11.03.2019}
}