Rickard, L., 1962. Late Cayugan (Upper Silurian) and Helderbergian (Lower Devonian) Stratigraphy in New York. New York State Museum BulletinThe University of the State of New York, Albany, New York.

Rickard, L., Fisher, D., 1973. Middle Ordovician Normanskill Formation, Eastern New York, Age, Stratigraphic, and Structural Position. American Journal of Science, vol.273, no.7, pp.580-590, Sep 1973 273, 580-590. doi:10.2475/ajs.273.7.580

Rickard, L., Fisher, D., 1971. Geologic Map of New York; Hudson-Mohawk Sheet, 1:250,000.

Broughton, J., Fisher, D., Isachsen, Y., Rickard, L., 1966. Geology of New York: A Short Account. New York State Museum Education LeafletThe University of the State of New York, Albany, New York.

Kirchgasser, W., Oliver, W., Rickard, L., 1985. Devonian Series Boundaries in the Eastern United States. Courier Forschungsinstitut Senckenberg 75, 233-260.

Rickard, L., 1985. Correlation of the subsurface Lower and Middle Devonian of the Lake Erie Region; Alternative Interpretation and Reply. Geological Society of America Bulletin 96, 1213-1220. doi:10.1130/0016-7606(1985)96<1218:COTSLA>2.0.CO;2

Rickard, L., 1985. The Middle-Upper Devonian Series Boundary; An Evaluation. Courier Forschungsinstitut Senckenberg 75, 227-232.

Kearney, M., Rickard, L., 1984. Subsurface stratigraphy of Medina Group (Lower Silurian), Clinton Group (Lower to Upper Silurian), and Lockport Group (Upper Silurian) of New York. AAPG Bulletin 68, 1921-1922.

Rickard, L., 1984. Correlation of the Subsurface Lower and Middle Devonian of the Lake Erie Region. Geological Society of America Bulletin 95, 814-828. doi:10.1130/0016-7606(1984)95<814:COTSLA>2.0.CO;2

Isachsen, Y., Landing, E., Lauber, J., Rickard, L., Rogers, W., 2000. Geology of New York, A Simplified Account, Second Edition. New York State Museum Educational LeafletThe University of the State of New York, Albany, New York.