Category:The Bell System Technical Journal, 1924
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Media in category "The Bell System Technical Journal, 1924"
The following 2 files are in this category, out of 2 total.
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The Bell System technical journal (1922) (14753563484).jpg 3,266 × 1,914; 640 KB
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The Bell System technical journal (1922) (14755904835).jpg 3,226 × 1,788; 2.37 MB