Issue 4/1973 Articles Issue GeschichteDiessenhofen Motor Glider Competition 4/1973 GeschichteF1E and SK at Altmatt 4/1973 Geschichte1973 Regional Championships 4/1973 Geschichte1973 World Free Flight Championships W. Heise4/1973 GeschichteMagnetic Control for Luckystar W. Heise4/1973 GeschichteF1E/SK European Championship W. Heise4/1973
