Two fold. sheets ([3]sides) in pocket.
Translation of: 'Obshchaia stratigraficheskaia shkala dokembriia'. Leningrad : Nedra, 1973.
Bibliography: p.329-360. _ Includes index.
Precambrian of the northern hemisphere : and general features of early geological evolution by L. I. Salop. ISBN 0444415106. Published by Elsevier in 1977. Publication and catalogue information, links to buy online and reader comments.