Companion text: Devonic and carbonic formations of southwestern New York, with stratigraphic map of the Olean Quadrangle / L. C. Glenn. 56th Annual Report. Albany : New York State Museum. Annual Report 56 vol.2, appendix 1904. Bulletin 69, 1903. pp. 967-899. 2pls. Another copy of map in source publication. Contour interval 20 feet. Also located under call number: DOC 8566.677 no.69.