MAGNETIC FIELD DEPENDENCE OF HIGH Tc SEMICONDUCTING CERAMICS F. Zuo, X. D. Chen, J. R. Gaines, W. E. Farneth, R. S. McLean and A. J. Epstein J. Phys. Colloques, 49 C8 (1988) C8-2143-C8-2144 DOI: 10.1051/jphyscol:19888959