| Title | The Logic of Geological Maps, with Reference to their Interpretation and Use for Engineering Purposes |
| Publication Type | Report |
| Year of Publication | 1974 |
| Authors | Varnes, David J. |
| Secondary Title | U. S. Geological Survey Professional Paper |
| Volume | 837 |
| Pagination | 1-48 |
| Institution | Department of the Interior |
| ISBN Number | 837 |
| Accession Number | S-1897 |
| Keywords | maps |
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