Rao, Digumarti Bhaskara . Assessing learning achievement / by Digumarti Bhaskara Rao - New Delhi : Discovery Pub., 2001 - xviii, 107 p. : ill. 23 cm. Includes index. ISBN: 8171416012 Subjects--Topical Terms: Education;Educational tests and measurements. Universal Decimal Class. No.: 370.1525