- Author: Otto Struve
- Language: English
- Year: 2015
- Author: Otto Struve (editor), G. H. Herbig (editor)
- Language: English
- Year: 2020
- Author: Otto Struve (editor), Beverly T. Lynds (editor), Helen Pillans (editor), Hans Klauder (editor)
- Language: German
- Year: 1967
- Author: Otto Struve, Beverly Lynds, Helen Pillans
- Language: German
- Year: 1962