Composition and physical characteristics of the glasses of the Portland vase
Investigation of ancient opal glasses including the Portland vase
"Reprinted from the Journal of the Society of Glass Technology, 1959, Vol. XLIII, pp. 262T-288T."
The Rooksby "paper is Communication no. 861 from the staff of the Research Laboratories of the General Electric Company Limited, Wembley, England."
Includes bibliographical references.