Impact Factor
2.93
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.
Prior to 2013, supplement treated as a separate publication. Supplement ceased with issue 202 (2012).
Also issued online.
Microfilm. v.6(1897)-45(1936). 35 microfilm reels : negative ; 35 mm.