Automobiles in 1973

Racing Car Design and Development by Terry, Len, Baker, Alan

Astronautical Research 1971: Proceedings of the 22nd Congress of the International Astronautical Federation Brussels, 20-25 September 1971 by

Astronautical Research 1972: Proceedings of the 23rd Congress of the International Astronautical Federation Vienna, 8-15 October 1972 by