Spectrum 
Subtitle: A Communicative Course in English Level 6 (Student Workbook)
Edition: Workbook edition
Publisher: Prentice Hall
Published: April 1994
Language: eng
Format: Paperback
Number of pages: 96
ISBN-13: 9780138302580
Subjects: ELT: Learning Material & Coursework; Language Arts / Linguistics / Literacy; Textbooks; American English; Education; Dictionaries - General; General; Testing & Measurement