Ordovician system in Ontario
By: [by] G. Marshall Kay
Series: Contributions of Department of Geology, Columbia University -- v. 42, no. 4; Contributions of Department of Geology, Columbia University -- v. 42, no. 4.
Published: 1939
Language: eng
Number of pages: 593
Subjects: Stratigraphic Geology; Paleontology
Notes: Caption title.

"Reprinted from 'Geologie der erde", Geology of North America, I, 1939".