00457nam a22001577a 4500 230615b |||||||| |||| 00| 0 eng d National Science Library National Science Library 621.39:681.324 N9 Handbook of communications systems management U.S.A.: CRC Press, 1999 xvii, Communication Science Held, Gilbert (Ed.) udc HDK 43923 43923 0 0 udc 0 62139681324_N9 0 66430 NSL NSL GF/Rk-13/C-2/R-5 1999-09-29 0 621.39:681.324 N9 178705 2023-06-15 00:00:00 1999-09-29 HDK