London: Institute of Petroleum, 1952, first Edition, Softcover, 205 pp. Illustrated. Good copy: ugly, quarter-sized stain to front cover and first few blanks; Tear to front cover. Ronald Bentley's personal copy, with the typed abstract for his contribution laid-in. Bentley's signature is on the front cover. His article, "The Use of Stable Isotopes in Biological Chemistry" appears on pages 117-126. Good.