Category:Internet Archive document bell00systemvol31techniamerrich
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This category contains an IA books PDF upload with extracted images. The category has been created automatically.
Media in category "Internet Archive document bell00systemvol31techniamerrich"
The following 2 files are in this category, out of 2 total.
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The Bell System technical journal (IA bell00systemvol31techniamerrich).pdf 820 × 1,350, 1,310 pages; 78.05 MB
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The Bell System technical journal 1952 Area Code map of USA.jpg 2,820 × 1,542; 645 KB