Gourdin, M. Lagrangian formalism and symmetry laws / [by] M. Gourdin - New York : Gordon and Breach Science Pub, [1969] - viii, 100 p. : ill. ; 24 cm. - Documents on modern physics . Translation of: Formalisme lagrangien et lois de symetrie Includes index Bibliography: p. 97 ISBN: ? 5.20 Subjects--Topical Terms: Symmetry (Physics)Quantum field theory Dewey Class. No.: 530.143