Echo made easy /

Main Author: Luthra, Atul.
Format: Book
Language:English
Published: New Delhi : Jaypee Brothers ; 2007.
Tunbridge Wells, UK : Anshan,
Edition:2nd ed.
Item Description:Includes index.
Physical Description:272 p. : ill. + 1 CD-ROM (3 1/2 in.)
ISBN:9781905740680