J. Phys., B (London), v. 7, no. 4, pp. 429-439; Other Information: Orig. Receipt Date: 31-DEC-74; Bib. Info. Source: UK (United Kingdom (sent to DOE from))
J. Phys., B (London), v. 8, no. 1, pp. 20-24; Other Information: Orig. Receipt Date: 30-JUN-75; Bib. Info. Source: UK (United Kingdom (sent to DOE from))