Haar, D. ter. Introduction to the physics of many-body systems / - New York : Interscience Publishers, c1958 - 127 p ; 21 cm. - Interscience tracts on physics and astronomy ; 5 . - Interscience tracts on physics and astronomy ; 5 . Includes index Subjects--Topical Terms: Many-body problem Dewey Class. No.: 530.144 / HAI 1958