. . "United States. Office of Vocational and Adult Education." . . "Vocational education United States." . . "Vocational education." . . "United States." . . . . "Vocational education and excellence for the 1980s : challenges, responses, and issues"@en . . . . . "Vocational education and excellence for the 1980s challenges, responses, and issues"@en . . . . . . . . . .