Impact Factor
4.59
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.
Supplements accompany some volumes.
Also available online.
Indexes: Author index; --Vols. 1-6, 1958/59-1961, with v. 8, no. 1; Author and subject index; --Vols. 16-20, 1967-71. 1 v; --Vols. 21-25, 1972-76. 1 v.
Vol. 38, no. 19 (1989)19920824 Notice published Printed on acid-free paper that meets the full ANSI standard for Permanent Paper