3,5/6=24; 5,9/10=28; 6,9=29; 7,4/5=30; 9,11u.12,4=32; 10,5/6=33[,1]; 11,3/4=33[,2]: International Astronautical Congress: Proceedings of the International Astronautical Congress (ISSN: 0074-1795)
1,5/6=4; 3=5; 5,11/12u.6,3/4u.7/8=6 von: International Colloquium on Gasdynamics of Explosions and Reactive Systems: International Colloquium on Gasdynamics of Explosions and Reactive Systems
8,9/10=6 von: International Symposium on Basic Environmental Problems of Man in Space: Papers
17,7=37 von: International Astronautical Federation: Papers presented at the ... congress of the International Astronautical Federation
1,5/6=5 von: Lunar International Laboratory: Proceedings of the Lunar International Laboratory symposium
1,11/12=24; 2,7/8=25; 3,5/6=26; 4,5/6=27; 5,9-10=28; 6,9=29; 7,4/5=30; 8,5/6=31; 9,4=32; 10,5/6u.11,3/4=33; 11,7/8=34; 12,10=35; 13,6/7u.11/12=36; 16-17,2u.4u.7=37; 17,6u.8u.11/12=38; 20=39 von: International Astronautical Congress: Selected papers from the ... International Astronautical Congress
13,6/7=36; 17,6u.8=38; 19,6/7u.9=39; 25.8/9=41; 26;7=42; 29,8=42; 29,10/11=43; 35,9/11=44 von: International Astronautical Federation: Selected papers presented at the ... congress of the International Astronautical Federation
14=36; 16=37; 18=38; 20=39; 22=40; 24=41; 28=42; 30=43; 34=44; 37=45; 38,4/8=46; 40,2/8=47; 41,4/10=48; 44,7/12=49; 47,2/9=50; 48,5/12=51; 51,1/9=52 von: International Astronautical Federation: Selected proceedings of the ... International Astronautical Federation congress
13,11/12=36; 17,11/12=38; 25,5/6=40 von: International Astronautical Federation: A selection of papers presented at the ... congress of the International Astronautical Federation
26,34=3; 42,10/12=5; 46,10/12=6 von: The search for extraterrestrial intelligence
