Silvius, G. Harold. Managing multiple activities in industrial education / G. Harold Silvius [and] Estell H. Curry. - Bloomington, Ill. : McKnight & McKnight Pub. Co., 1971 - xxiv, 648 p. : illus. 24 cm. ISBN: 873454561 Subjects--Topical Terms: Technical education. Universal Decimal Class. No.: 370.113