Cooperatives: Principles and practices in the 21st century
Written by Kimberly A. Zueli and Robert Cropp, published by the University of Wisconsin, 2004.
This publication is the fourth and most extensive revision of the Marvin A. Schaars' text Cooperatives, Principles and Practices, University of Wisconsin Extension-Madison, Publication A1457, July 1980. What has come to be known simply as "the Schaars book. "was originally written in 1936 by Chris L. Christensen, Asher Hobson, Henry Bakken, R.K.