Spectrum. : A communicative course in English.
- Englewood Cliffs, New Jersey, US : Prentice Hall Regents, 1987.
- 136 p.
0-13-826637-9
English language--Study and teaching--Foreign speakers.
428 SPE V1
0-13-826637-9
English language--Study and teaching--Foreign speakers.
428 SPE V1