http://www.biodiversitylibrary.org/
Bulletins de l'Académie royale des sciences, des lettres et
des beaux-arts de Belgique.
Bruxelles.
http://www.biodiversitylibrary.org/bibliography/5550
ser.2:t.13 (1862):
http://www.biodiversitylibrary.org/item/113652 Article/Chapter Title: De l'âge des phyllades fossilifères de GrandManil, près de GemblouxAuthor(s): Malaise, Constantin
Subject(s): Phyllades fossilières, Grand-Manil
Page(s): Page 168, Page 169, Page 170, Page 171
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