Dasgupta, Mary Ann Low-cost, no-cost teaching aids/ Mary Ann Dasgupta - New Delhi: National Book Trust, 1997. - 145 p. ; 24 cm. - (Creative Learning Series) . ISBN: 8123720548 978-81-237-2054-8 Subjects--Topical Terms: Teaching Aid Dewey Class. No.: 371.33 / DAS/L