- Author: Wilfried Hartmann (editor) Kenneth Pennington (editor)
- Language: English
- Year: 2008
- Author: Franz Hartmann H. Spencer Lewis William Q. Judge Paul Sedir
- Language: English
- Year: 2020
- Author: Georg Hartmann
- Language: German
- Year: 1900
- Author: K. Hartmann (editor), W. Schirmer (editor)
- Language: German
- Year: 1981
- Author: Georgi Kanewez (editor), K. Hartmann (editor), G. Gruhn (editor), Ralf Gierth (editor)
- Language: German
- Year: 1983
- Author: Rudolf Hartmann
- Language: German
- Year: 2022
- Author: Hartmann (editor), Ludwig Wolff (editor)
- Language: German
- Year: 1966
- Author: W. Hartmann
- Language: German
- Year: 1869