The relative merits of three methods of subtraction
Subtitle: an experimental comparison of the decomposition method of subtraction with the equal additions method and the Austrian method
By: by John Theodore Johnson ...
Publisher: Teachers college, Columbia university
Published: 1938
Place of publication: New York city
Language: eng
Number of pages: 76
Subjects: Subtraction
Notes: Vita.

Published also as Teachers college, Columbia university, Contributions to education, no. 738.

Thesis (Ph.D.)--Columbia university, 1938.

Bibliography: p. 72-76.