BioStor
 | Revision of the African tortoises and turtles of the suborder Cryptodira, by Arthur Loveridge and Ernest E. Williams A Loveridge (1957) Bulletin of The Museum of Comparative Zoology 115: 161-557 |
 | Revision of the African Tortoises and Turtles of the Suborder Cryptodira Arthur Loveridge and Ernest E Williams (1957) Bulletin of the Museum of Comparative Zoology 115: 163-557 |