title: Problems of studying extinction risks.
authors.forename: A H
authors.initials: AH
authors.lastname: Harcourt
mesh_terms: D000818:Animals; D049628:Body Size; D016208:Databases, Factual; D017753:Ecosystem; D004777:Environment; D008322:Mammals / Q000033:anatomy & histology / Q000502:physiology; D011156:Population Density; D012098:Reproduction; D012306:Risk