Erwin, R. B., 1957, _The Geology of the Limestone of Isle La Motte and
South Hero Island, Vermont_, Vermont Geological Survey, Bull. 9.
Stone, S. W. and Dennis, J. G., 1964, _The Geology of the Milton
Quadrangle, Vermont_, Vermont Geological Survey Bull. 26.
Additional reports on the geology of Vermont state parks distributed
by the Vermont State Library, Montpelier, Vermont 05602.
_The Geology of Groton State Forest_, by Robert A. Christman, 1956
_The Geology of Mt. Mansfield State Forest_, by Robert A. Christman,
1956
_The Geology of the Calvin Coolidge State Forest Park_, by Harry W.
Dodge, Jr., 1959
_Geology of Button Bay State Park_, by Harry W. Dodge, Jr., 1962
_The Geology of Darling State Park_, by Harry W. Dodge, Jr., 1967