Horrocks, John.
European Guide to Telecommunications Standards (Version 3) / Horrocks John. - Pirbright, Surrey : Horrocks Technology, 1995. - 568 s., kilka liczbowań, ind.; 30 cm.
European Guide to Telecommunications Standards (Version 3) / Horrocks John. - Pirbright, Surrey : Horrocks Technology, 1995. - 568 s., kilka liczbowań, ind.; 30 cm.