| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Luna Cognita: A Comprehensive Observers’ Handbook of the Known Moon | 978-1-4939-1663-4 (1-4939-1663-7) | 2020 |
Robert A. Garfinkle · Robert G. · Robert Girvan · Robert Greifinger · Robert Griffin · Robert Griffon · Robert Gryphon