1.
London : Butterworths, 1998.
French | N 740 HEN.C |
2.
3.
London [England] : Sweet & Maxwell, 1993.
Fourth edition.
Italian | N 40 PHI.W |
4.
Geneva [Switzerland] : World Intellectual Property Organization, 1989.
English | E 2384N13 WIPO.CR/BJ |
5.
6.