
- Author: Dr. Peter S. Ruckman
- Language: English

- Author: Dr. Peter S. Ruckman
- Language: English

- Author: Dr. Peter S. Ruckman
- Language: English
- Year: 1983

- Author: Dr. Peter S. Ruckman
- Language: English
- Year: 1999

- Author: Dr. Peter S. Ruckman
- Language: English
- Year: 1996