Fossil sponge spicules from the upper chalk : found in the interior of a single flint-stone from Horstead in Norfolk Hinde, George Jennings, 1839-1918 creator text book Munich Printed by C. Wolf & son 1880 1880
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ENG Sponges, Fossil QE775 .H64 Museum of Comparative Zoology--Biodiversity Heritage Library digitization project https://www.biodiversitylibrary.org/bibliography/14897 18667724 06007254 10.5962/bhl.title.14897 DLC