Oral arithmetic,
by George Wentworth and David Eugene Smith.
APA Citation
Wentworth, G. (19131910). Oral arithmetic. Boston, etc.: Ginn and Co..
MLA Citation
Wentworth, George, 1868-. Oral Arithmetic. Boston, etc.: Ginn and Co., 19131910.
Warning: These citations may not always be complete (especially for serials).