Impact Factor
3.60
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.
Also available online.
Articles in English, French, or German.
Vol. 27, no. 9 (1989)19920909 Notice published Printed on acid-free paper that meets the full ANSI standard for Permanent Paper