A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Features of semi-electronic, silent visual paging system which also incorporates an optional selective audible feature, installed in John Wanamaker department store in New York City; system employs Faraday auto-sequence equipment; typical floor layout.
Features of semi-electronic, silent visual paging system which also incorporates an optional selective audible feature, installed in John Wanamaker department store in New York City; system employs Faraday auto-sequence equipment; typical floor layout.
Silent paging
Elec Construction Maintenance
Schuhler, A.A. (author)
1948
Article (Journal)
English
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