| Clavis Bibliorum: The Key of the Bible, Unlocking | | |
| Clavis Homerica, Sive Lexicon Vocabulorum Omnium, | | |
| The Grimoire of St. Cyprian - Clavis Inferni | | |
| Clavis or Key to Unlock the Mysteries of Magic | | |
| The Clavis or Key to the Magic of Solomon: From | | |
| Clavis Calendaria, Vol. 2 of 2: Or, a Compendious | | |
| Novo Clavis Esoterika | | |
| Clavis Apollinis (Latin Edition) | | |
| Clavis Goetica: Keys to Chthonic Sorcery | | |
| Clavis or Key to Unlock the Mysteries of Magic | | |
| Clavis Patristica Psevdepigraphorvm Medii Aevi. | | |
| Clavis Conciliorum Occidentalium septem prioribus | | |
| Clavis patrum apostolicorum | | |
