Dial 911
Subtitle: modern emergency communications networks
By: George Leon and Leo G. Sands.
Contributors: Sands, Leo G., joint author.
Publisher: Hayden Book Co.
Published: 1975
Place of publication: Rochelle Park, N.J
Language: eng
Number of pages: 118
Subjects: Police communication systems.; Telephone -- Emergency reporting systems.
Notes: Includes index.