Butler, Charles H. 1894- The teaching of secondary mathematics / Charles S. Butler [and] F. Lynwood Wren. - 4th ed. - New York : McGraw-Hill 1965. - 613 p. : illus. 24 cm. - McGraw-Hill series in education . - Curriculum and methods in education . Includes bibliographies. LCCN: 64025596 Subjects--Topical Terms: Mathematics--Study and teaching (Secondary) LC Class. No.: QA11 / .B88 1965 Dewey Class. No.: 373 / BUT 1965