News & Comment News and Notes Science 06 Jan 1950:Vol. 111, Issue 2871, pp. 16-22DOI: 10.1126/science.111.2871.16 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.
Science Vol 111, Issue 287106 January 1950 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)