Impact Factor
4.60
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 available online.
Microfilm. v.21 (1969) 1 microfilm reel : negative ; 35 mm.
Vol. 42, no. 1 (JAN 1988)19890818 Notice not published Printed on acid-free paper