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| 1 | Title: | Middle Devonian formations in the subsurface of northwestern Ohio | |
| Creator: | Janssens, Adriaan. | ||
| Publication: | Division of Geological Survey, Columbus, Ohio,1970. | ||
| Notes: | Bibliography: p. 17-18. | ||
| Call #: | F34JQ O79 No.78 | ||
| Extent: | iii, 22 p. illus., maps. 28 cm. | ||
| Subjects: | Geology, Stratigraphic -- Devonian | Geology -- Ohio | Formations (Geology) -- Ohio | Ohio imprints 1970 | ||
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