Impact Factor
3.08
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 varies slightly.
Print issues ceased with 2021.
Also issued online.
Microfilm. v. 1 (1929)-22 (1950). 9 microfilm reels : negative ; 35 mm.
Text in English or Portuguese. Online version available in English, Spanish and Portuguese, 2000- . Search interface available in English, Spanish and Portuguese.