Bernstein, Allen L., 1919- Trouble shooting mathematics skills [electronic resource] / [by] Allen L. Bernstein [and] David W. Wells.. — Teacher's ed.. — New York, : Holt, Rinehart and Winston, [c1963]. — T-59, viii, 358 p. : illus. 24 cm. Subjects--Topical Terms: Arithmetic--Study and teaching (Elementary) LC Class. No.: QA135.5 / .B36 1963