TY - RPRT TI - Digital and preliminary bedrock geologic map of the Townshend 7.5 x 15 minute quadrangle, Vermont AU - Thomas R. Armstrong AU - Nicholas M. Ratcliffe PY - 1998 DO - 10.3133/ofr98335b UR - https://pubs.usgs.gov/publication/ofr98335B ID - ofr98335B ER -