> I see no functional difference between a published book and a CD-ROM. Once Gregor Hagedorn Inst. f. Mikrobiologie, BBA Net: G.Hagedorn at bba.de Koenigin-Luise-Str. 19 Tel: +49-30-8304-2220 or -2221 14195 Berlin, Germany Fax: +49-30-8304-2203 Often wrong but never in doubt!