The 900 factbook
Subtitle: a user's guide to the interactive voice information services industry.
Publisher: Virgo Pub.
Published: 1991
Place of publication: [Scottsdale, AZ
Language: eng
Subjects: Pay-per-call telephone services -- United States -- Directories.
Other titles: Nine hundred factbook; 900 fact book; User's guide to the interactive voice information services industry; 4th media journal.
Notes: Cover title.
Selected from The 4th media journal.