Bibliography : Pearl-oyster
| Michael J. Curley | Physiologus |
| Georges Cuvier; Theodore Wells Pietsch, ed.; Abby J. Simpson, trans. | Cuvier’s History of the Natural Sciences |
| Florence McCulloch | Mermecolion - A Medieval Latin Word for 'Pearl Oyster' |
| Albert Pauphilet | Le Bestiaire de Philippe de Thaon |
| Martha Hale Shackford | Legends and Satires from Medieval Literature |
| R. Allen Shoaf | The Pearl |
| Leo Wiener | Contribution Towards a History of Arabico-Gothic Culture, Volume IV: Physiologus Studies |