Genehmigt für den Gebrauch in Schulen durch Education and Relgious Affairs Branch, Office of Military Government for Germany (US) am 15.VII.46, file no. GE-IA 350.01 (Germany)
Genehmigt für den Gebrauch in Schulen durch Education and Religious Affairs Branch, Office of Military Government for Germany (US.) am 22.I.1948, file no. GE-IA 350.01 (Germany)