Impact Factor
3.79
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.
Has occasional supplement.
Also issued online.
Microfilm. v. 16-19 (1969-1970) 4 microfilm reels : negative ; 35 mm.