Judul asli : "Elektrotec in Kort Bestek"
Bibliografi : hlm. 269-273
No Inv.: 2314-2315/BD/Perp/87/2c~2495/S/Perp/89/1c~3735-3740/S/Perp/92/6c~7400-7411/P/Perp/92/5c~79914-79916/S/01/3c~87344-87345/P/Perp/03/2c
Bibliografi : hlm. 237
No Inv.: 5624-5628/P/Perp/92/5c
Judul asli : "Fachkunde fur Elektroberufe"
No Inv.: 717-719/P/Perp/92/3c~1847-1851/P/Perp/95/5c~8069-8074/P/Perp/92/5c~823/S/Perp/88/1c~114873/PH/Perp/08/1c
Bibliografi : hlm. 159-161