INFLUENCE OF THE Zn2+ AND Cd2+ ION CONTENTS UPON THE NATURAL SPIN RESONANCE FREQUENCY IN Ni-Zn AND Ni-Cd FERRITES J. GIERALTOWSKIJ. Phys. Colloques, 38 C1 (1977) C1-57-C1-59DOI: https://doi.org/10.1051/jphyscol:1977111