Controversy over Yellowstone 's biological resources Author Chester C. Journal/Series Environment | Vol. 38(8); 10 - 15; 34 - 36; 9 p. Date 1996 Source IUCN (ID: ANA-059326) Publisher | Place of publication Heldref Publications | Washington, DC, USA Language English Country/Territory United States of America, United States of America Subject Wild species & ecosystems Keyword Biodiversity Protected area