This site is supported entirely by Indiana University. You are welcome to use material on this site for personal education or classroom use. It is FREE and offered as a service by Indiana University, a public institution. However, for any commercial, website, and other use of this material, you would need to obtain permission from Prof. Engs and by the publisher of previous published journal articles and books. Copyrighted 2022, by The Trustees of Indiana University and Ruth Clifford Engs.