Division of powers between the European communities and their member states in the field of external relations : colloquium, 30 and 31 May 1980, Amsterdam /
compiled by Europa Institute of the University of Amsterdam and Section for European and Economic Law of the University of Groningen ; edited by Albert Bleckmann ... [et al.]
- Amsterdam : Kluwer, 1981
- vi, 149 p. ; 25 cm.