Title from envelope and pamphlet. "With a descriptive text by J.E. Mathews and E.M. Wilde." Includes bibliographical references in pamphlet, pages 7-8.
Series:
Geologic map series ; no. 50D
OCLC:
(OCoLC)21268148
Locations:
OVUX522 -- University of Iowa Libraries (Iowa City)
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.