Nölker, Helmut. Vocational training : teaching, curriculum, planning / Helmut Nölker and Eberhard Schoenfeldt. - New Delhi : Wiley Eastern, 1980. - 240 p. : ill. ; 22 cm. ISBN: 0852266359 Subjects--Topical Terms: Vocational teachers. Dewey Class. No.: 374.013 / NOV 1980