MAGNETIC INTERACTION IN SELF-REVERSING ANDESITIC PUMICE IN RELATION TO IRON ALLOYS M. Haag, F. Heller et R. AllenspachJ. Phys. Colloques, 49 C8 (1988) C8-2065-C8-2066DOI: https://doi.org/10.1051/jphyscol:19888936