Letters Defining Human Life By BRIAN G. ZACK See allHide authors and affiliations Science 02 Oct 1981:Vol. 214, Issue 4516, pp. 8DOI: 10.1126/science.214.4516.8-a BRIAN G. ZACKFind 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 214, Issue 451602 October 1981 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
