Fels, Mary. Joseph Fels: His Life-Work . Whitefish, MT: Kessinger Publishing, LLC, 2006.

Written by his wife, this is a republishing of Joseph Fels" life work in social reform. In this easy-to-read book, the reader will discover Joseph Fels as a Philadelphian philanthropist with a keen interest in promoting Henry George's ideas of single-tax reform.

Referenced in:
Who Wants to be a Millionaire?