Volume 19 of Group III (Crystal and Solid State Physics) deals with the magnetic properties of metals, alloys and metallic compounds. The amount of information available in this field is so substantial that volume III/19 had to be split into several subvolumes. Subvolumes III/19a through III/19f treat the intrinsic magnetic properties, i.e. those properties which depend only on the chemical composition and the crystal structure. So far, subvolumes...