Commission of the European Communities. (1976). Patent information and documentation: An inventory of services available to the public in the European Community. Verlag Dokumentation.

Commission of the European Communities. Patent Information and Documentation: An Inventory of Services Available to the Public in the European Community. München: Verlag Dokumentation, 1976.

Commission of the European Communities. Patent Information and Documentation: An Inventory of Services Available to the Public in the European Community. Verlag Dokumentation, 1976.