Hollis, Loye Yvorne, 1933- Acquiring competencies to teach mathematics in elementary schools / by L. Y. Hollis and W. Robert Houston. - Professional Educators Publications, [1973]. - 80 p. : ill. ; 23 cm. - The Professional education series . Bibliography: p. 77-80. ISBN: 0882240323 LCCN: 72089057 Subjects--Topical Terms: Mathematics--Study and teaching (Elementary) Subjects--Index Terms: მათემატიკა მათემატიკის სწავლება დაწყებით სკოლაში LC Class. No.: QA135.5 / .H584 Dewey Class. No.: 372.7 Universal Decimal Class. No.: 372.851