
- Author: Richard Petersen
- Language: English
- Year: 2018

- Author: Richard Petersen
- Language: English
- Year: 2018

- Author: Richard Petersen
- Language: English
- Year: 2014

- Author: Richard Petersen
- Language: English
- Year: 2014

- Author: Richard Petersen
- Language: English
- Year: 2015

- Author: Richard Petersen (auth.)
- Language: English
- Year: 2014

- Author: Richard Petersen
- Language: English
- Year: 2005

- Author: Richard Petersen (auth.)
- Language: English
- Year: 2013

- Author: Richard Petersen Alfred Andreassen (auth.) Theodor Jessen (eds.)
- Language: German
- Year: 1928

- Author: Richard Petersen (auth.)
- Language: German
- Year: 1925