ISBNs beginnend mit 978-3-9520142-x-x Transworld Telecommunication DirectoryEuropeInstitut f. Wissenschaft u. Ethik 1992 Transworld Telecommunication DirectoryAfrika, America, Asia, AustraliaInstitut f. Wissenschaft u. Ethik 1992 Transworld Trade Directory Institut f. Wissenschaft u. Ethik 1992 Transworld Telecommunication DirectoriesEuropeInstitut f. Wissenschaft u. Ethik 1992 Transworld Telecommunication DirectoriesAfrica, America, Asia, Oceania, Near EastInstitut f. Wissenschaft u. Ethik 1992 Transworld Trade Directories Institut f. Wissenschaft u. Ethik 1992 Transworld Telecommunication DirectoriesEuropeIntercable 1993 Transworld Telecommunication DirectoriesAfrica, America, Asia, Oceania, Near EastIntercable 1993 Transworld Trade Directories Intercable 1993
