1.
2.
Geneva [Switzerland] : World Intellectual Property Organization, 1987-
English | E 2314F13(3) WIPO.IP/ABU |
3.
Geneva : World Intellectual Property Organization, 1987.
English | E 224F13(3) WIPO.S (F/E) |
4.
Geneva [Switzerland] : World Intellectual Property Organization, 1985-
First edition.
English | E 2314F13(3) WIPO.UNDP/IP/LO |