21 B 146.335 T r y bus , Martin: European Defence Procurement Law. International and national: procurement systems as models for a liberalised defence procurement market in Europe. -The Hague lusw.l: Kluwer Law International (1999). XL, 332 S. 8° Aberystwyth, Univ. v. Wales, Diss. (European .t!Onographs • 21.) ISBN 90-411-9737-0