Impact Factor
2.58
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. 30, no. 1 (Jan. 1935); title from cover.
Suspended 1977-1984.
Also issued online.
Indexes: Vols. 1 (1910)-12 (1922) with v. 12; v. 13 (1923)-24 (1931) with v. 24; v. 25 (1932)-36 (1938) with v. 36.