Proceedings of the 33rd Colloquium on the Law Outer Space 1990 Dresden Germany
Proceedings of the 33rd Colloquium on the Law of Outer Space. 1990 Dresden, Germany, published in 1991.
Proceedings of the 30th Colloquium on the Law of Outer Space 1987 United Kingdom
Proceedings of the 30th Colloquium on the Law of Outer Space. 1987 United Kingdom, published in 1988.