Age Determination for Lampreys Beamish, F. W. H. ; Medland, T. E. Abstract Publication: Transactions of the American Fisheries Society Pub Date: January 1988 DOI: 10.1577/1548-8659(1988)117<0063:ADFL>2.3.CO;2 Bibcode: 1988TrAFS.117...63B