TY - RPRT TI - Characteristics of discrete and basin-centered parts of the Lower Silurian regional oil and gas accumulation, Appalachian basin: Preliminary results from a data set of 25 oil and gas fields AU - Robert T. Ryder PY - 1998 DO - 10.3133/ofr98216 UR - https://pubs.usgs.gov/publication/ofr98216 ID - ofr98216 ER -