1.
Geneva [Switzerland] : World Intellectual Property Organization (WIPO), 1999.
English | E 33120 WIPO.D(C) |
2.
Geneva [Switzerland] : World Intellectual Property Organization (WIPO), 1999.
English | E 33120 WIPO.P |
3.
Geneva [Switzerland] : World Intellectual Property Organization (WIPO), 1999.
English | E 33120 WIPO.D(R) |
4.
Budapest : Magyar Szabadalmi Hivatal - Szellemi Tulajdon Vilagszervezete, 1998.
Seventh edition.
English | E 232K141 WIPO.I |