Fraga, Serafin Many-electron systems: properties and interactions [by] Serafin Fraga and Gulzari Malli. - Philadelphia Saunders 1968. - xvi, 196 p. 24 cm. - Studies in physics and chemistry no. 7 . Includes bibliographies. LCCN: 68011630 //r902 Subjects--Topical Terms: Electrons.Many-body problem. LC Class. No.: QC721 / .F82 Dewey Class. No.: 539.7/211