Impact Factor
4.07
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.
Title from cover.
Print issues ceased with v. 49 (2010)
Also issued online.
Vol. 3, no. 1 (1986)19890816 Notice published Printed on acid-free paper