Bibliography : Pearl-oyster

Claudius Aelianus; A. F. Scholfield, trans. On the Nature of Animals
Michael J. Curley Physiologus
Florence McCulloch Mermecolion - A Medieval Latin Word for 'Pearl Oyster'
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