Variations in species of mucrospirifer from Middle Devonian rocks of Michigan, Ontario and Ohio
By: by John Robert Tillman
Published: 1981
Language: eng
Format: Microform
Number of pages: 38
Subjects: Spiriferida; Geology, Stratigraphic -- Devonian; Paleontology -- Michigan; Paleontology -- Ontario; Paleontology -- Ohio
Notes: Microfilm of typescript. Ann Arbor, Mich. : University Microfilms International, 1981. -- 1 reel ; 35 mm

Thesis (Ph.D.)--University of Michigan, 1962

Bibliography: leaf 28