1H-NMR RELAXATION STUDIES ON THE NATURE OF THE SEMICONDUCTING STATE OF (TMTTF)2Br AND (TMTTF)2PF6: MAGNETISM T. Takahashi, F. Creuzet, D. Jérôme and J.M. Fabre J. Phys. Colloques, 44 C3 (1983) C3-1095-C3-1097 DOI: 10.1051/jphyscol/1983147