Drechsler,W. Fiber bundle techniques in gange theories by W.Drechsler,M.E.Mayer ,ed.by A. Bohn , J. D. Dollard - Berlin Springer-Verlag 1977 - ix, 248p. - Lecture notes in physics No.67 . Lecture delivered at University of Texas at Austin ISBN: 3540083502 Dewey Class. No.: 530.143 / N77