APA

United States, . (1972). Interior nomination: hearing, 92d Congress, 1st session, on nomination of Vincent E. McKelvey as Director, Geological Survey, Nov. 23, 1971. [Washington, D.C.]: .

Chicago

United States, . 1972. Interior nomination: hearing, 92d Congress, 1st session, on nomination of Vincent E. McKelvey as Director, Geological Survey, Nov. 23, 1971. [Washington, D.C.]: .

Harvard

United States, . (1972). Interior nomination: hearing, 92d Congress, 1st session, on nomination of Vincent E. McKelvey as Director, Geological Survey, Nov. 23, 1971. [Washington, D.C.]: .

MLA

United States, . Interior nomination: hearing, 92d Congress, 1st session, on nomination of Vincent E. McKelvey as Director, Geological Survey, Nov. 23, 1971. [Washington, D.C.]: . 1972.