Title: Middle Silurian Ludlovian and Wenlockian sponges from Baillie-Hamilton and Cornwallis islands, Arctic Canada
First published: 1989
Subjects: Fossil Sponges, Paleontology, Sponges, Fossil
Places: Baillie-Hamilton Island, Cornwallis Island, Nunavut
Time periods: Silurian
LC classification: QE185 .A43 no. 391, QE775 .A43 no. 391