TY - BOOK TI - Differential geometric mehtods in theoretical physics : proceedings of DGM Conference U1 - 530.15636 PY - 1986/// CY - Singapore PB - World Scientific N1 - Contents :; v.13 : Edited by H. D. Doebner and T. D. Palev; v.15 : Edited by H. D. Doebner and J. D. Hennig ER -