Variation in coal reflectance.

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Main Author: Siever, Raymond.
Language(s): English
Published: Urbana, 1957.
Subjects: Coal > Coal / Testing.
Reflection (Optics)
Physical Description: 11 p. illus. 26 cm.
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Item Link	Original Source
Full view Information circular / Illinois State Geological Survey ; [no. 241]	University of Illinois at Urbana-Champaign

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