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Costs and returns for investments in technical schooling by a group of North Carolina High School graduates
Carroll, Adger B., (1968)
Rates of return on investment in technical education in the ante-bellum American economy
Aldrich, Terry Mark, (1975)
Trade, industrial and technical education : [report
(1966)
Linear Progamming Models for Water Pollution Control
Loucks, Daniel P., (1967)