First steps in teaching number
By: by John R. Clark, Arthur S. Otis and Caroline Hatton
Contributors: Otis, Arthur Sinton, 1886-1963; Hatton, Caroline
Publisher: World book company
Published: 1929
Place of publication: Yonkers-on-Hudson, N. Y
Language: eng
Number of pages: 225
Subjects: Arithmetic -- Study and teaching