Geology, geochemistry, and mineral resource assessment of the Big Branch and Peru Peak wildernesses and the Wilder Mountain Roadless Area, Rutland and Bennington Counties, Vermont : as assessment of the mineral resources and mineral resource potential based on geologic mapping, a geochemical survey, and consideration of the derived data in the regional context of metallogeny and appropriate ore deposit models / - Peper, John D. (U.S. G.P.O. ;)