DAS, B.C. Higher trigonometry B.C. Das and B.N. Mukherjee - 31st ed. - Kolkata U.N. Dhur 2006. - xv, 312p. For pass course. ISBN: 81-85624-69-0 70.00 Subjects--Topical Terms: TRIGONOMETRY Dewey Class. No.: MATH 516.34 / DBt06