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2. (Ed.), Systematics and the Properties of the Lanthanides, NATO ASI Series. Reidel, Boston (1982).
3. and in Handbuch der Physik XVIII/I, edited by p. 389. Springer, Berlin (1968).
4. The rare-earth metals
5. (Ed.), Progress in Science and Technology of the Rare Earths, Vol. 1. Pergamon Press, New York (1964).