Newcomb, Ralph S.
Modern methods of teaching arithmetic / Ralph S. Newcomb ; introd. Ellwood P. Cubberley
Modern methods of teaching arithmetic / Ralph S. Newcomb ; introd. Ellwood P. Cubberley
. - Boston : Houghton Mifflin, 1926
. - XV, 352 p. 20 cm
. - (Riverside Textbooks in Education)
37.015.3
372.47