Impact Factor
4.01
Estimated influence, citation density, publishing volume, and citation integrity from the analytics table.
Volume, recency, access pattern, and citing-community signals from the journal analytics record.
Recent article records with DOI-first linking and condensed abstracts.
Issue for Vol. 91, no. 2 ( Jan. 2003) issued as Vol. 91 special issue (Jan. 2003).
Issues for Jan. 1937-Nov. 1978 called also no. 1-182.
Available also online.
v.89, no. 6 (Jun. 2002)20020715 Notice is not published Printed on acid-free paper that meets the full ANSI standard for Permanent Paper
digitized 2023