Regeneration Theory (H Nyquist] ,in, The Bell System Technical Journal volume XI no. 1 January 1932.
American Telephone & Telegraph, NY 1932; complete separate January issue; 196 pages.
American Telephone & Telegraph, NY 1932; complete separate January issue; 196 pages.
BSTJ, American Telephone and Telegraph Co, NY 1940; vol IX no. 1, January 1940; whole issue, blue paper wraps, pp 1 - 160 inclusive; photographs, illustrations, references.