Impact Factor
3.13
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.
Vol. 1, no. 1, Feb. 1974, called Sample issue.
Also issued online.
(1988)19890818 Notice published Printed on acid-free paper