United States Geological Survey: Porovnání verzí

* 1879–1881 [[Clarence King]]

* 1881–1894 [[John Wesley Powell]]

* 1894–1907 [[Charles Walcott|Charles Doolittle Walcott]]

* 1907–1930 [[George Otis Smith]]

* 1930–1943 [[Walter Curran Mendenhall]]

* 1943–1956 [[William Embry Wrather]]

* 1956–1965 [[Thomas Brennan Nolan]]

* 1965–1971 [[William Thomas Pecora]]

* 1971–1978 [[Vincent Ellis McKelvey]]

* 1978–1981 [[Henry William Menard]]

* 1981–1993 [[Dallas Lynn Peck]]

* 1994–1997 [[Gordon P. Eaton]]

* 1998–2005 [[Charles G. Groat]]

* od roku 2006 [[Mark Myers]]

* [http://www.usgs.gov/ Oficiální stránky]