Impact Factor
2.68
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.
Quarterly.
Title from cover.
Print issues ceased with v. 25, no. 4 (2015).
Vol. 4 complete in one issue.
Vol. 5 (1995) never published.
Supplements accompany some issues.
Also issued online.
Vol. 1, no. 1 (WINTER 1991)19930309 Notice not published Printed on acid-free paper