1. Geology of the West Point quadrangle, New York;Berkey;N.Y. State Museum Bull,1919
2. Magnetite deposits of the Sterling Lake, New York-Ringwood, New Jersey area;Hotz;U. S. Geol. Survey Bull,1952
3. The dikes of the Hudson River Highlands;Kemp;Am. Naturalist,1888
4. Storm king granite at Bear Mountain, New York;Lowe;Bull. Geol. Soc. Am,1950
5. Geology of the Cortlandt series and its emery deposits;Rogers;Ann. N.Y. Acad. Sci,1911