Impact Factor
1.65
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 issued online.
Indexes: Vols. 1-17, 1941-57, with v. 17; Vols. 20-21, 1960-61, in v. 22.
(1989)19890818 Notice not published Printed on acid-free paper