Letters Letters to the Editor By P. P. Hudec, P. Sonnenfeld See allHide authors and affiliations Science 20 Dec 1974:Vol. 186, Issue 4169, pp. 1075DOI: 10.1126/science.186.4169.1075 P. P. HudecFind this author on Google Scholar Find this author on PubMed Search for this author on this site P. SonnenfeldFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.
Science Vol 186, Issue 416920 December 1974 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
