[X012L2-F]
https://edisondigital.rutgers.edu/folder/X012L2-F→ View documents → View metadata about this item set
Items
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[X012L2A], Technical Note, Thomas Alva Edison, March 23rd, 1877
1877-03-23 -
[X012L2B], Technical Note, Thomas Alva Edison, May 16th, 1877
1877-05-16 -
[X012L2C], Technical Note, Thomas Alva Edison, September 20th, 1877
1877-09-20 -
[X012L2D] Technical Note, c. 1878
1878-00-00 -
[X012L2E], Technical Note, American Bell Telephone Co, 1880
1880-00-00