This article, by Sparks and Cardew, appeared in Med. Biol. Illus. 1973 Nov;23(4):230-1.
Anyone have access to it? -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.

