| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Le sette città d'oro | 978-88-7068-482-7 (88-7068-482-2) | 1992 |
| Quest for the Cities of Gold | 978-0-553-26295-7 (0-553-26295-5) | 1987 |
Richard G · Richard Glatz · Richard Glatzar · Richard Goldsbrough · Richard Goldsby · Richard Goldschmidt · Richard Goldsmith · Richard Goldstein · Richard Goldstone · Richard Goldwasser