| English Original | Language | Translation | Translator |
|---|---|---|---|
| Ancient Celts | Spanish | Los Antiguos Celtas | Waldo Reboredo Arroyo |
| Tara | Spanish | Tara | Waldo Reboredo Arroyo |
| Initiation of religions in India | Spanish | El Inicio de las Religiones en la India | Waldo Reboredo Arroyo |
| Religious Developments in Ancient India | Spanish | El Desarrollo de las Religiones en la Antigua India | Waldo Reboredo Arroyo |
| Esoteric Buddhism | Spanish | Budismo Esotérico | Waldo Reboredo Arroyo |
| Gandhara Civilization | Spanish | La Civilización Gandhara | Waldo Reboredo Arroyo |