The Number Concept —— Its Origin and Development

----- 数字概念：它的起源和发展

ISBN: 9781332336876 出版年：2016 页码：227 Levi Leonard Conant Forgotten Books

Sincere thanks are due to those who have assisted the author in the preparation of his materials. Especial acknowledgment should be made to Horatio Hale, Dr. D. G. Brinton, Frank Hamilton Cushing, and Dr. A. F. Chamberlain.