7.5 minute series (topographic) [Illinois] /
| Corporate Author: | |
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| Format: | Government Document Map |
| Language: | English |
| Published: |
Reston, Va. : Champaign, Ill. :
The Survey ; Illinois Geological Survey,
[between 1900 and 1999]
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| Subjects: |
| Item Description: | Relief shown by contours and spot heights. "Topography by photogrammetric methods from aerial photographs." Includes quadrangle location map. Cartographic material. |
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| Physical Description: | maps : color ; on sheets 69 x 56 cm. |