LettersDiscussion and Correspondence SHARKS AT SAN DIEGO By H. W. Norris See allHide authors and affiliations Science 23 Dec 1921:Vol. 54, Issue 1408, pp. 630DOI: 10.1126/science.54.1408.630 H. W. Norris Find this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF Article Information vol. 54 no. 1408 630 DOI: https://doi.org/10.1126/science.54.1408.630 PubMed: 17739565 Published By: American Association for the Advancement of Science Print ISSN: 0036-8075 Online ISSN: 1095-9203 Copyright & Usage: © 1921 Author Information Altmetric Article usage Article lifetimeLast 6 monthsThis monthArticle usage: July 2007 to September 2020 AbstractFullPdf Jul 2007001 Oct 2007001 Mar 2009001 Jul 2009001 Oct 2011003 Nov 2011001 Jan 2012001 Mar 2012001 Oct 2012001 Jun 2013100 Aug 2013100 Jun 2014001 Feb 2017001 Apr 2017002 Aug 2018001 Sep 2018001 Mar 2020001 Sep 2020001 View PDF Extract