ON THE FIELD COOLED SUSCEPTIBILITY OF SUPERCONDUCTING YBaCuO SAMPLES F. Celani, R. Messi, N. Sparvieri, S. Pace, A. Saggese, C. Giovannella, L. Fruchter et C. Chappert J. Phys. Colloques, 49 C8 (1988) C8-2107-C8-2108 DOI: 10.1051/jphyscol:19888947