TY  - BOOK
TI  - Unit resource book: waves, sound, and light
SN  - 9780618406616
U1  - DK12 507 [2007]
PY  - 2007///]
CY  - Evanston, Illinois
PB  - A Houghton Mifflin Company
KW  - Science
KW  - Study and teaching (Middle school)
ER  -