Book digitized by Google from the library of University of Michigan and uploaded to the Internet Archive by user tpb. Imprint varies Title from vol. t.p Published: Chicago, Ill. : University of Chicago Press, 1968- Latest issue consulted: Vol. 170, no. 6 (Dec. 2007) Two vols. per year, 6 issues per vol. , Published for the American Society of Naturalists, 1951- SERBIB/SERLOC merged record ACQN: aq 96005993