Astronautical research 1970 proceedings of the 21st Congress of the International Astronautical Federation, Constance, 5 October, 1970 /
International Astronautical FederationCongress21st1970Constance.
Napolitano, Luigi G.
Contensou, Pierre.
Hilton, William Frank.
Amsterdam London North-Holland Publishing
1971
Includes index
Includes contributions in French
Astronautics