371.425 Sil T Silvius, George Harold, 1908- Teaching successfully, the industrial arts and vocational subjects (by) G. Harold Silvius (and) Estell H. Curry. Bloomington, Ill., Mcknight Pub. (c1953) 339 p. ilus., láms. gráficos 23 cm. Appendix B: Indices and gudes for audiovisual aids. p. 321-323. Appendix C: Professional books for students and teachers of industrial education