Judul asli : "Dasmagnetiche Feild"
No Inv.: 1351-1354/P/Perp/92/4c
No Inv.: 629-631/Perp/84/3c~2308-2309/BD/Perp/87/2c~2125/S/Perp/87/1c~1252-1254/P/Perp/92/3c~748/S/Perp/91/1c
Judul asli : "Der Dreshstrom"
No Inv.: 1578/S/Perp/88/1c~8891-8900/P/Perp/88/10c~1618-1620/Perp/85/3c
No Inv.: 3968,3966,3974,3971, 3972,3973,3969,3967/P/Perp/99/8c
No Inv.: 127959/SM/Perp/10/1c
Judul asli : "Arbeit, Leistung, Wirkungsgrad"
Judul asli : "Materiaalkunde"
Judul asli : "Procestechnologie"