Carus, P. (1909). Philosophy as a science: A synopsis of writings of Dr. Paul Carus, containing an introduction written by himself, summaries of his books, and a list of articles to date. Chicago: Open court Pub. Co..

Carus, Paul. Philosophy As a Science: A Synopsis of Writings of Dr. Paul Carus, Containing an Introduction Written By Himself, Summaries of His Books, and a List of Articles to Date. Chicago: Open court Pub. Co., 1909.

Carus, Paul. Philosophy As a Science: A Synopsis of Writings of Dr. Paul Carus, Containing an Introduction Written By Himself, Summaries of His Books, and a List of Articles to Date. Chicago: Open court Pub. Co., 1909.