title: Protection fails to stem amphibian decline.
authors.forename: Nigel
authors.initials: N
authors.lastname: Williams
mesh_terms: D000663:Amphibians / Q000145:classification / Q000502:physiology*; D000818:Animals; D044822:Biodiversity; D003247:Conservation of Natural Resources; D003364:Costa Rica; D053476:Extinction, Biological; D011156:Population Density; D012104:Reptiles / Q000145:classification / Q000502:physiology