Olson, Joanne P. Learning to teach reading in the elementary school : utilizing a competency-based instructional system / Joanne P. Olson, Martha H. Dillner. - 2nd ed. - New York : MacMillan, 1982. - 598 p. : ill. ; 25 cm. Includes bibliographies and index. ISBN: 0023893001 Subjects--Topical Terms: Reading (Elementary).Competency base education.