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Folder Bell Telephone Quarterly / Bell Telephone Magazine

Renamed from BTQ to BTM in 1941.

Documents

Select Toggle Title Date Download
pdf 49Autum BTM P154 WeCo Telephone Refurbishment (651 downloads) Popular Download (pdf, 1.63 MB)
pdf 52Summer BTM P87 Bell System Practices (826 downloads) Popular Download (pdf, 1.58 MB)
pdf 47 48 Winter BTM P180 - Nationwide Operator Toll Dialing (1175 downloads) Popular Download (pdf, 876 KB)
pdf 49 Spring BTM P66 - The Winter's Toll (Winter Storms) (1052 downloads) Popular Download (pdf, 2.28 MB)
pdf 71 Nov BTM P1 - WTC (World Trade Center) (814 downloads) Popular Download (pdf, 317 KB)
pdf 52 Summer BTM - Bell System Prototypes (903 downloads) Popular Download (pdf, 77 KB)
pdf 68 May BTM P25 - - Electronic Trimline-style Prototype Photo (727 downloads) Popular Download (pdf, 38 KB)

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