Impact Factor
2.42
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.
Description based on: Vol. 12, no. 1, published in 1983; title from cover.
Print issues ceased with v. 44, no. 4 (Dec. 2015).
Also issued online.
v. 27, no. 1 ( 1998)20020716 Notice published Printed on acid-free paper