Hits 1-3 within 3 documents
Informationen zur Situation des Jugendarbeitsschutzes [research report]
Source: DJI Verl., 1969
(Forschungsbericht, 02/1969)
Hits 1-3 within 3 documents
Author(s): Lutz, Burkart; Seyfarth, Constans
Source: DJI Verl., 1969
(Forschungsbericht, 02/1969)
Author(s): Gerth, Werner; Bertram, Barbara.- 1968. 68p.