[CITATION][C] Report to Congress on the recovery of threatened and endangered species: fiscal years 2003–2004
US Fish and Wildlife Service - Washington, DC: US Fish and Wildlife Service, 2004
[CITATION][C] Report to Congress on the Recovery of Threatened and Endangered Species: Fiscal Years 2005–2006
US Fish and Wildlife Service - USFWS.(23 March 2012, 2008
[CITATION][C] Report to Congress on the Recovery of Threatened and Endangered Species: Fiscal Years 2009–2010
US Fish and Wildlife Service - 2012 - Washington, DC: Fish and Wildlife …
[CITATION][C] Report to Congress on the Recovery of Threatened and Endangered Species: Fiscal Years 2013-2014
US Fish and Wildlife Service - Many species have an estimated time to recovery of, 2016