The Production of Fitness. The material in this video was adapted from "Principles of Economics" which is entrusted to the UNIVERSITY OF MINNESOTA LIBRARIES PUBLISHING EDITION, 2016. THIS EDITION ADAPTED FROM A WORK ORIGINALLY PRODUCED IN 2012 BY A PUBLISHER WHO HAS REQUESTED THAT IT NOT RECEIVE ATTRIBUTION.

Source: Jeff Galloway, Galloway’s Book on Running (Bolinas, CA: Shelter Publications, 2002), p. 56.