|
|
| John Ashton
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Curious Creatures in Zoology
(New York: Cassel Publishing, 1890) 
  Web site/resource link
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| Ron Baxter, Colum Hourihane, ed.
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Learning from Nature: Lessons in Virtue and Vice in the Physiologus and Bestiaries
(in Colum Hourihane, ed., Virtue & vice: the personifications in the Index of Christian art, Prionceton, NJ: Princeton University Press, 2000, 29-41)
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| Anne Clark
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|
Beasts and Bawdy
(New York: Taplinger Publishing Company, 1975)
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| Michael J. Curley
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|
Physiologus
(Austin: University of Texas Press, 1979)
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| Debra Hassig
|
|
Homo animal est, homo animal non est: Text and Image in Medieval English Bestiaries
(Columbia University, 1993) 
|
| John Gotthold Kunstmann
|
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The Hoopoe: A Study in European Folklore
(Chicago: University of Chicago, 1938)
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| R. L. H. Lops, Q. Mok, I. Spiele, P. Verhuyck, eds.
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|
La huppe: histoire littéraire et légendaire d'un oiseau
(in Q. Mok, I. Spiele, P. Verhuyck, eds. , Mélanges de linguistique, de littérature et de philologie médiévales offerts à J. R. Smeets, Leiden: Instituut Frans, 1982, 171-185) 
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| Ann Payne
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Medieval Beasts
(New York: New Amsterdam Books, 1990)
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