"Numerot, nummer"
Subtitle: numeropalvelua 90 vuotta
By: Terhi Toivonen
Publisher: Eniro Finland
Published: 2002
Place of publication: Espoo]
Language: fin
Number of pages: 93
Subjects: Telephone operators; History; Helplines; Telephone companies; Helsingin puhelinyhdistys; Helsingin puhelin; Elisa Communications; Suomen numeropalvelu; Eniro Finland
Notes: Includes bibliographical references (p. 92-93).