00515nam a2200169Ia 4500 LDD 181029s9999 xx 000 0 und d 780304284 LDD Boucher, J.R. Traffic system design handbook timesaving telecommunication traffic tables and p J.R. Boucher New York The Institute of Electrical Engineers 1993 xv,179p. Telecommunications handbook series 2754 03-10-2003 ddc BK 0 0 ddc 0 0 46667 LDD LDD 2018-11-01 0 621.382 B66T 029990 2018-11-01 2018-11-01 BK 46668 46668