Proceedings of the XVIII International Astronautical Congress, Belgrade, 1967
editor-in-chief, Michał Łunc
Pergamon Press, 1968
editor-in-chief, Michał Łunc ; editors, P. Contensou, G.N. Duboshin and W.F. Hilton
Pergamon Press 1968 Proceedings of the XVIII International Astronautical Congress, Belgrade, 1967 / editor-in-chief, Michał Łunc v.3
Available at 10 libraries
Pergamon Press 1968 Proceedings of the XVIII International Astronautical Congress, Belgrade, 1967 / editor-in-chief, Michał Łunc v.2
Pergamon Press 1968 Proceedings of the XVIII International Astronautical Congress, Belgrade, 1967 / editor-in-chief, Michał Łunc v.1
Available at 12 libraries
Pergamon Press 1968 Proceedings of the XVIII International Astronautical Congress, Belgrade, 1967 / editor-in-chief, Michał Łunc v.4
Available at 11 libraries
