The Geology of the Oil Regions of Warren, Venango, Clarion, and Butler Counties: Including surveys of the Garland and Panama conglomerates in Warren ... of oil well rig and tools, and a discussion
Ein Fachbuch, das die geologischen Schichten der Ölfelder in Warren, Venango, Clarion und Butler aufschlüsselt, die Garland‑ und Panama‑Konglome ...