Invisible Universe: The Electromagnetic Spectrum from Radio Waves to Gamma Rays 
Subtitle: Grades 6-8 (Gems Guides)
Edition: Teacher edition
Publisher: LHS GEMS
Published: August 2002
Language: eng
Format: Paperback
Number of pages: 116
ISBN-13: 9780924886690
Subjects: Elementary; Education / Teaching; Education; Teaching Methods & Materials - Science & Technology