Understanding data communications
Contributors: Held, Gilbert, 1943-; Friend, George E.
Edition: 3rd ed., rev. / by Gilbert Held
Publisher: SAMS; Sams
Published: 1991
Place of publication: [Indianapolis, Ind.]
Language: eng
Number of pages: 368
Subjects: Data transmission systems; Computer networks
Notes: "First edition by George E. Friend ... [et al.]."

Includes index