"Verhaltenskodex der Luftsportler", published by Deutscher Aero Club, Rudolf Braas Str 20, Postfach 1361, 63150 Heusenstamm, Germany.
"Recommended Measures to help Reduce the Noise Related Nuisance from Light Aeroplanes", ICAO Working Group 1, report of the Prop 3 Task Group.
"Diminishing Noise Nuisance caused by Light Aircraft", Conseil National du Bruit, France, 1992
"Considerate Flying" published by General Aviation Awareness Council, 50a Cambridge Street, London, UK
"How Green is Your Airfield ?" published by General Aviation Awareness Council, 50a Cambridge Street, London, UK.
“Manual on Sport and the Environment” published by International Olympic Committee, Chateau de Vidy, C.P. 356, 1007 Lausanne, Switzerland.
