Matches in Library of Congress for { ?s ?p Telephone systems Data processing.. }
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- 2005531068 subject "Telephone systems Data processing.".
- 93022174 subject "Telephone systems Data processing.".
- 95053874%2F%2Fr97 subject "Telephone systems Data processing.".
- 96029858%2F%2Fr98 subject "Telephone systems Data processing.".
- 96077079 subject "Telephone systems Data processing.".
- 97024164 subject "Telephone systems Data processing.".