Title: Permo-Carboniferous fresh water burrows
First published: 1975
Subjects: Amphibians, Fossil, Burrowing animals, Fossil, Fossil Amphibians, Fossil Burrowing animals, Fossil Lungfishes, Lungfishes, Fossil, Paleontology, Sedimentary structures
Places: United States
Time periods: Permo-Carboniferous
LC classification: QE1 .F4 vol. 33, no. 15, QE852.D5 .F4 vol. 33, no. 15