Method of preparing record cards with conductive marks
作者： William H Wolowitz
DOI:
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摘要:
lens.org 参考文章(4)
Russell Edward Wriothes Curzon, Record bearing medium and methods of preparation ,(1948)
Harmon P Elliott, Thin printing device for addressing machines ,(1937)
Knut A Knutsen, Recording and controlling card ,(1948)
Carroll K Moon, Record card controlled machine ,(1939)