News & CommentScientific Events MEMORIALS Science 15 Nov 1940:Vol. 92, Issue 2394, pp. 449DOI: 10.1126/science.92.2394.449 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.
Science Vol 92, Issue 239415 November 1940 Table of Contents Print Table of Contents Front Matter (PDF)