The following literature references are from Amphibian Declines: The Conservation Status of United States Species, edited by Michael Lannoo (©2005 by the Regents of the University of California), used with permission of University of California Press. The book is available from UC Press.

Yaffee, S.L. 1982. Prohibitive Policy—Implementing the Federal Endangered Species Act. MIT Press, Cambridge, Massachusetts.
Yaffee, S.L., A.F. Phillips, I.C. Frantz, P.W. Hardy, S.M. Maleki and B.E. Thorpe. 1996. Ecosystem Management in the United States. Island Press, Washington, D.C.
Yamaguti, S. 1935. Studies on the helminth fauna of Japan. Part 10. Amphibian nematodes. Japanese Journal of Zoology 6:387–392.
Yamaguti, S. 1961. Nematodes of vertebrates. Pp. 1–679. In Systema Helminthum. Volume 3, Part 1. Interscience Publishing, New York.
Yamaguti, S. 1971. Synopsis of Digenetic Trematodes of Vertebrates. Volume 1. Keigaku Publishing Company, Tokyo, Japan.
Yamamura, K. 1999. Key-factor/key-stage analysis for life table data. Ecology 80:533–537.
Yan, N.D., W. Keller, N.M. Scully, D.R.S. Lean and P.J. Dillon. 1996. Increased UV-B penetration in a lake owing to drought-induced acidification. Nature 381:141–143.
Yanev, K.P. 1978. Evolutionary studies of the plethodontid salamander genus Batrachoseps. Ph.D. dissertation. University of California, Berkeley, California.
Yanev, K.P. 1980. Biogeography and distribution of three parapatric salamander species in coastal and borderland California. Pp. 531–550. In Power, D.M. (Ed.), The California Islands: Proceedings of a Multidisciplinary Symposium. Santa Barbara Museum of Natural History, Santa Barbara, California.
Yanev, K.P. and D.B. Wake. 1981. Genic differentiation in a relict desert salamander, Batrachoseps campi. Herpetologica 37:16–28.
Yang, X.B. and D.O. TeBeest. 1992. Green treefrogs as vectors of Colletotrichtum gloeosporioides. Plant Disease 76:1266–1269.
Yang, X.B., D.O. TeBeest and E.L. Moore. 1992. Biological vectors for dispersal of Colletotrichium gloeosporioides. Proceeding of the Arkansas Academy of Sciences 46:96–99.
Yeatman, H.C. and H.B. Miller. 1985. A naturally metamorphosed Gyrinophilus palleucus from the type-locality. Journal of Herpetology 19:304–306.
Yeo, J.J. and C.R. Peterson. 1998. Amphibian and reptile distribution and habitat relationships in the Lost River Mountains and Challis-Lemhi Resource Areas. Idaho Bureau of Land Management, Technical Bulletin 98-10, Boise, Idaho.
Yoffe, E. 1992. Silence of the frogs. New York Times Magazine 6:36–38, 64–76.
Yom, S. 1990. It’s no use telling these jumpy lovers to look before you leap. Wall Street Journal, 26 July.
Young, B.E., K.R. Lips, J.K. Reaser, R. Ibáñez, A.W. Salas, J.R. Cedeño, L.A. Coloma, S. Ron, E. LaMarca, J.R. Meyer, A. Muñoz, F. Bolaños, G. Chavez and D. Romo. 2001. Population declines and priorities for amphibian conservation in Latin America. Conservation Biology 15:1213–1223.
Young, F.N. and J.R. Zimmerman. 1956. Variations in temperature in small aquatic situations. Ecology 37:609–611.
Young, J.E. and B.I. Crother. 2001. Allozyme evidence for the separation of Rana areolata and Rana capito and for the resurrection of Rana sevosa. Copeia 2001:382–388.
Young, K.A. 2001. Defining units of conservation for intraspecific biodiversity: reply to Dimmick et al. Conservation Biology 15:784–787.