Impact Factor
2.73
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. 29, no. 12 (Dec. 2020).
Available also online.
Vol. 1, no. 1 (NOV-DEC 1991)19911202 Notice published Printed on acid-free paper