Migdal A B Qualitative methods in quantum theory Migdal A B; Leggett Anthony Tr. - London W A Benjamin 1977 - xxiii, 437p. cm. - Frontiers in physics: A lecture note and reprint series; 48 . Standard No.: 31453 Source: Textual Subjects--Topical Terms: Quantum theoryPhysics Dewey Class. No.: CN1, L72