Wallenstein, Gerd.
Setting Global Telecommunication Standards / Wallenstein Gerd. - London : Artech - House, 1990. - XV, 256 s.: il.; 24 cm.
0890063907
Setting Global Telecommunication Standards / Wallenstein Gerd. - London : Artech - House, 1990. - XV, 256 s.: il.; 24 cm.
0890063907