1 “...For much of the 20th century, scientific contacts between the Soviet Union and western countries...”

2 “...In May 1976 Lucian B. Platt organized a highly successful Penrose Confer­ ence on The Formation...”

3 Table of Contents: “... Table -- B. Summary of the Common Minerals and Their Properties Mineral Tables -- C. Petrologic Tables...”

4 Table of Contents: “... -- Nonhorizontal Hydrocarbon—Water Contacts -- Tilted Oil—Water Contacts Attributable to Factors Other Than...”