RT Book T1 Fernunterricht in Deutschland: Analysen, Initiativen, Reformen A2 Vesper, Burkhard LA German PP Bad Honnef PB Bock YR 1974 UL https://ixtheo.de/Record/038995549 CN KK6311.C67 SN 387066035X K1 Correspondence schools and courses : Law and legislation : Germany (West) K1 Correspondence schools and courses : Germany (West)