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Applied Clay Mineralogy
Grim, Ralph E.
The Mica in Argillaceous Sediments: American Mineralogist, V22, No. 7
Grim, Ralph E/Bray, Roger Hammond/Bradley, William Frank
Illinois Clays and Shales as a Mortar Mix
Hursh, Ralph K/Lamar, John Everts/Grim, Ralph E
Petrology of the Pennsylvanian Underclays of Illinois; Report of Investigations No. 52
Grim, Ralph E (Ralph Early) 1902-/Allen, Victor T (Victor Thomas) 1898-