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000068138 090__ $$aTK6397$$b.J64 1982
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000068138 099__ $$aTK6397 .J64 1982
000068138 1102_ $$aBell Telephone Laboratories.
000068138 24512 $$aA history of engineering and science in the Bell System:$$bswitching technology, 1925-1975 /$$cprepared by A.E. Joel, Jr. and other members of the technical staff, Bell Telephone Laboratories ; G.E. Schindler, editor.
000068138 260__ $$a[New York] :$$bBell Telephone Laboratories,$$c1982.
000068138 300__ $$axiv, 639 p. :$$bill. ;$$c24 cm.
000068138 500__ $$aIncludes index.
000068138 61020 $$aAmerican Telephone and Telegraph Company$$xHistory.
000068138 650_0 $$aTelephone$$zUnited States$$xHistory.
000068138 650_0 $$aTelecommunication$$zUnited States$$xHistory.
000068138 85200 $$bgen$$hTK6397 .J64 1982
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