Unconventional Methods In Exploration For Petroleum And Natural Gas by William B. Heroy
1969. No Edition Stated. 241 pages. No dust jacket. This is an ex-Library book. Blue cloth. Expected library inserts, stamps and inscriptions. Contains black and white diagrams throughout. Pages remain bright and clear. Binding is firm. Boards and spine have minimal shelf-wear, with minor corner bumping and crushing to ends. Light rubbing and scuffing to front board, moderate to rear.