Coppen, Helen Elizabeth. Aids to teaching and learning / by Helen Coppen. - 1st ed. - Oxford : PERGAMON, 1969 - x, 230 p. : illus. ; 20 cm. - The Commonwealth and International Library. Education and Educational Research Division . Bibliography: p. 225-230. ISBN: 0080129048 Subjects--Topical Terms: Teaching--Aids and devices. LC Class. No.: LB1043 / .C656 1969 Dewey Class. No.: 371.3 / COA 1969