- Author: Dr. jur. Richard Blum (auth.)
- Language: German
- Year: 1929
- Author: Ingenieur Richard Blum (auth.)
- Language: German
- Year: 1911
- Author: Dr. jur. Richard Blum (auth.)
- Language: German
- Year: 1916
- Author: Richard Blum
- Language: English
- Year: 2005
- Author: Dee-Ann LeBlanc, Richard Blum
- Language: English
- Year: 2007
- Author: Richard Blum
- Language: English
- Year: 2008
- Author: Richard Blum
- Language: English
- Year: 2005
- Author: Dee-Ann LeBlanc, Richard Blum
- Language: English
- Year: 2007
- Author: Richard Blum Christine Bresnahan
- Language: English
- Year: 2011
- Author: Richard Blum ANGIE WETHINGTON Rich Blum
- Language: English
- Year: 2000