J. Phys., F (London), v. 3, no. 4, pp. 893-906; Other Information: Orig. Receipt Date: 31-DEC-73; Bib. Info. Source: UK (United Kingdom (sent to DOE from))
Solid State Commun., v. 12, no. 9, pp. 881-884; Other Information: Orig. Receipt Date: 31-DEC-73; Bib. Info. Source: UK (United Kingdom (sent to DOE from))
Solid-State Commun. 11: No. 11, 1557-61(1 Dec 1972).; Other Information: Orig. Receipt Date: 30-JUN-73; Bib. Info. Source: UK (United Kingdom (sent to DOE from))