Proceedings of the XIXth International Astronautical Congress, New York, 1968
editor-in-chief, Michał Łunc
Pergamon Press, 1970
editor-in-chief, Michał Łunc ; editors, P. Contensou, G.N. Duboshin and W.F. Hilton
Pergamon Press 1970 Proceedings of the XIXth International Astronautical Congress, New York, 1968 / editor-in-chief, Michał Łunc v.4
Available at 5 libraries
Pergamon Press 1970 Proceedings of the XIXth International Astronautical Congress, New York, 1968 / editor-in-chief, Michał Łunc v.3
Available at 4 libraries
Pergamon Press 1970 Proceedings of the XIXth International Astronautical Congress, New York, 1968 / editor-in-chief, Michał Łunc v.2
Pergamon Press 1970 Proceedings of the XIXth International Astronautical Congress, New York, 1968 / editor-in-chief, Michał Łunc v.1