Template:Bardack & Zangerl, 1971
- Bardack, D. & Zangerl, R. 1971. Lampreys in the fossil record. pp. 67–84 in Hardisty, M.W. & Potter, I.C. (eds.). The Biology of Lampreys. Volume 1. Academic Press: London and New York. xiv + 423 p. ISBN 978-0123248015