W1973 Soviet nuclear tests
WAeroflot Flight 13
WAeroflot Flight 19
WAeroflot Flight 109
WAeroflot Flight 141
WAeroflot Flight 630
WAeroflot Flight 964
WAeroflot Flight 2022
WAeroflot Flight 3932
WAeroflot Flight 6551
WBalkan Bulgarian Airlines Flight 307
W1973 Soviet economic reform
WKosmos 557
WThe Land of Sannikov
WLuna 21
WLunokhod 2
WMars 4
WMars 6
WMars 7
WSalyut 2
WSoyuz 12
WSoyuz 13
W1973 World Congress of Peace Forces