Nolker, Helmut. Vocational training: teaching, curriculm, planning / by Helmut Nolker ; Eberhard Schoenfeldt. - / - New Delhi : Wiley Eastern Ltd. , 1993 - 240p : ISBN: 0-85226-635-9 Subjects--Topical Terms: Vocational Training Dewey Class. No.: T9(Y4):3-2 / N3