Petroglyphs in the Susquehanna River Near Safe Harbor, Pennsylvania

Donald A. Cadzow, 1934 (2001 reprint). This 1934 work in archaeology is considered a classic on these “picture rocks.” The 1930–32 field survey was precipitated by the impending flooding of a section of the Susquehanna River by several hydroelectric dams. Comprehensive maps, photographs, and drawings of many of the petroglyphs that were found on three small islands in the river. 61 pp., 6 x 9. paperback