Spencer, E. W. (1993). Geologic maps: A practical guide to the interpretation and preparation of geologic maps; for geologists, geographers, engineers, and planners. Macmillan.
Chicago Style (17th ed.) CitationSpencer, Edgar W. Geologic Maps: A Practical Guide to the Interpretation and Preparation of Geologic Maps; for Geologists, Geographers, Engineers, and Planners. New York: Macmillan, 1993.
MLA (9th ed.) CitationSpencer, Edgar W. Geologic Maps: A Practical Guide to the Interpretation and Preparation of Geologic Maps; for Geologists, Geographers, Engineers, and Planners. Macmillan, 1993.
Warning: These citations may not always be 100% accurate.