Elie Cartan and Albert Einstein: Letters on Absolute Parallelism, 1929-1932/fr-ca/elie-cartan-and-albert-einstein-letters-on-absolute-parallelism-1929-1932/AD061BDF-6570-48E9-8536-1DCC9E8AD5F5.htmlAD061BDF-6570-48E9-8536-1DCC9E8AD5F5
Elie Cartan and Albert Einstein: Letters on Absolute Parallelism, 1929-1932