The echinoderms and Permian-Triassic time - 1973
Provinciality and diversity across the Permian-Triassic Systems and their mutual boundary - 1973
Allstones Creek reef (Frasnian), Alberta - 1989
Stromatoporoid reefs and banks in the Silurian of the Appalachian Basin - 1989
Crinoid-bryozoan reef mounds, Upper Carboniferous Amdrup Land, eastern north Greenland - 1989