Petrov, A. Z. Einstein spaces/ by A. Z. Petrov; translated by R. F. Kelleher; translation edited by J. Woodrow. - [1st English ed.] - Oxford: New York: Pergamon Press, [1969]. - xiii, 411 p.: 23 cm. Bibliography: p. 385-406. ISBN: 0080123155 LCCN: 67023712 //r924 Nat. Bib. No.: GB69-13489 Subjects--Topical Terms: Generalized spaces.Relativity (Physics)Gravitation. Dewey Class. No.: 530.11 / P497e