Division of Energy and Geological ResourcesIowa Dept. of Natural Resources,
Copyright Date:
1989?
Description:
13 p. : ill. ; 22 cm.
Reproduction Info:
Microfiche. Des Moines, Iowa : Distributed by Iowa Depository Library Center, State Library of Iowa, Distributed by Iowa Depository Library Center, State Library of Iowa, 1990. 1 microfiche : negative.
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