Landolt-Börnstein. Numerical Data and Functional Relationships in Science and Technology. New series. Group II. Atomic and Molecular Physics. Supplement 4 (1973, 1974) to Volume 12, Magnetic Properties of Coordination and Organometallic Transition Metal Compounds. Sub-Volume b. Electron Paramagnetic Resonance : By E. König and G. König. Springer Verlag, Berlin etc., 1984, xxxix + 352 pages. DM 710. ISBN 3-540-13018-7.