Book Reviews The Planets: Their Origin and Development. Harold C. Urey. New Haven, Conn.: Yale Univ. Press, 1952. 245 pp. $5.00 + See all authors and affiliations Science 20 Jun 1952:Vol. 115, Issue 2999, pp. 689-690DOI: 10.1126/science.115.2999.689 BART J. BOKFind 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 below.