Overbeck, C. J. (August 1973). "What does a man possess?". The Rotarian. Vol. 123, no. 2. Published by Rotary International. p. 47. ISSN0035-838X. Retrieved April 9, 2011.
Overbeck, C. J. (August 1973). "What does a man possess?". The Rotarian. Vol. 123, no. 2. Published by Rotary International. p. 47. ISSN0035-838X. Retrieved April 9, 2011.