News & CommentScientific Events RARE CHEMICALS See allHide authors and affiliations Science 30 Apr 1943:Vol. 97, Issue 2522, pp. 396DOI: 10.1126/science.97.2522.396 Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.
Science Vol 97, Issue 252230 April 1943 Table of Contents Print Table of Contents Back Matter (PDF) Front Matter (PDF)
