Preview: Computer mapping of coal reserves by sulfur level.

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Bibliographic Details
Corporate Author:	Harvard University. Laboratory for Computer Graphics and Spatial Analysis
Format:	Book
Language:	English
Published:	Cambridge, Mass., Harvard Graduate School of Design, 1971.
Subjects:	Coal > Sulfur content > Data processing. Coal > Appalachian Region > Maps > Data processing. Coal > Maryland > Allegany County > Maps > Data processing. Coal > Maryland > Garrett County > Maps > Data processing.
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