Publishers International ISBN Directory 2000-2001 [electronic resource]. - Berlin : International ISBN agency, 2000. - 1 compact disc (CD-ROM) ; 12 cm.. - Title from disc label. - System requirements: IBM PC or compatible. - Windows 3.xx or Windows 95, with a CD-ROM drive, RAM of 8 Mbytes on a 386, 486 CPU or more. - ISBN 3-598-40451-4 : [n. p.][MFN: 60]
Publishers International ISBN Directory [computer file]. - Berlin : International ISBN agency, 1998. - 1 computer laser optical disc ; 12 cm.. - Title from disc label. - System requirements: IBM PC or compatible; Windows 3.xx or Windows 95, with a CD-ROM drive, RAM of 8 Mbytes on a 386, 486 CPU or more. - ISBN 3598404026 : [n. p.][MFN: 158]