How ' critical ' is a critical habitat?: The United States Fish and Wildlife Service 's duty under the Endangered Species Act Author Smith S. Journal/Series Dickinson Journal of Environmental Law & Policy | Vol. 8(2); 343 - 381; 39 p. Date 1999 Source IUCN (ID: ANA-065172) Publisher | Place of publication Dickinson Journal of Environmental Law & Policy | Carlisle, PA, USA Document type Article in periodical Language English Country/Territory United States of America Subject Wild species & ecosystems Keyword Protection of habitats Institution