- Author: Roger B. Beck
- Language: English
- Year: 2000
- Author: Russell R.
- Language: English
- Year: 1997
- Author: James Roger Sharp, Nancy Weatherly Sharp, Kevin G. Atwater, Jon L. Wakelyn, Charles F. Ritter
- Language: English
- Year: 2000
- Author: Kirsten Wolf
- Language: English
- Year: 2004
- Author: Susan C. W. Abbotson
- Language: English
- Year: 2000
- Author: Robert Felgar
- Language: English
- Year: 2000
- Author: Richard P. Reading Brian Miller
- Language: English
- Year: 2000
- Author: Eugenie Carol Scott
- Language: English
- Year: 2009
- Author: Hans Delbrück
- Language: English
- Year: 1982