Singh, Uttam Kumar. Science education / Uttam Kumar Singh, A K. Nayak. - New Delhi : Roshan Offset Printers, 2004. - 319 p. : black and white illustrations ; 22 cm. ISBN: 8171694314 Subjects--Topical Terms: Science--Study and teaching. Dewey Class. No.: CIR 371.3 Si617 2004