Farm mechanics in vocational agriculture, a survey. - Hollenberg, Alvin Herbert, 1901- ([Washington] U.S. Dept. of Health, Education, and Welfare, Office of Education, 1959)
With : Supervision to improve instruction in distributive education / Roman F. Warmke. Washington : U.S. Dept. of Health, Education, and Welfare. Office of Education, 1959. Bound together subsequent to publication.
Keywords: Agricultural education -- United States; Agricultural engineering -- Study and teaching