Unified field theories.

Einstein's unified field theory Tonnelat, Marie-Antoinette 1966 Proceedings of the XXIV International Conference on High Energy Physics, Munich, Fed. Rep. of Germany, August 4-10, 1988 R. Kotthaus, J.H. K�uhn, eds 1989 The structure of field space Edelen, Dominic G. B. 1962