Ehlers, G. M. (1973). Stratigraphy of the Niagaran series of the Northern Peninsula of Michigan. Museum of Paleontology [University of Michigan].
Chicago Style (17th ed.) CitationEhlers, George Marion. Stratigraphy of the Niagaran Series of the Northern Peninsula of Michigan. [Ann Arbor]: Museum of Paleontology [University of Michigan], 1973.
MLA (8th ed.) CitationEhlers, George Marion. Stratigraphy of the Niagaran Series of the Northern Peninsula of Michigan. Museum of Paleontology [University of Michigan], 1973.
Warning: These citations may not always be 100% accurate.