- Author: John McKee Barr
- Language: English
- Year: 2014
- Author: John S. Barr
- Language: English
- Year: 2007
- Author: John McKee Barr
- Language: English
- Year: 2014
- Author: Timothy L Kauffman, Ronald W Scott, John O Barr, Michael L Moran
- Language: English
- Year: 2015
- Author: John Gorman Barr G. Ward Hubbs
- Language: English
- Year: 1989
- Author: Timothy L. Kauffman PhD PT John O. Barr PhD PT Michael L. Moran ScD PT
- Language: English
- Year: 2007