Drilling Down Author Kaplan M.D.G. Journal/Series National Parks | Vol. 88 (3), p. 34-40 Date 2014 Source IUCN (ID: ANA-088647) Publisher | Place of publication National Parks Conservation Association | Washington, DC, USA ISSN 0276-8186 Document type Article in periodical Language English Country/Territory United States of America Subject Mineral resources Keyword Oil Website www.npca.org