Bibliografi : hlm. 225- 229
No Inv.: 4755-4759/P/Perp/92/5c
No Inv.: 1115-1118/S/Perp/92/4c~832-836/S/Perp/91/5c~474-477/S/Perp/89/4c~769-772/S/Perp/88/4c~1692/S/Perp/87/1c~2796/S/Perp/87/1c~299/S/Perp/88/1c~498-503/S/Perp/90/6c~643-645/S/Perp/93/3c~848-849/S/Perp/96/2c~80061/S/02/1c
No Inv.: 4904/P/Perp/92/1c
No Inv.: 132328/SM/Perp/12/1c
No Inv.: 1489-1490/S/Perp/88/2c~6134-6138/P/Perp/92/5c~2834-2835/BD/Perp/87/2c
No Inv.: 134-137/S/Perp/89/4c~300/S/Perp/89/1c~1879/S/Perp/89/1c~686/S/Perp/89/1c~1944/S/Perp/91/1c
No Inv.: 4525-4527/P/Perp/97/3c
Judul asli : "Soziales Verhalt im Kinderganten"
Judul asli : "Crisis in Education"