TY  - BOOK
AU  - Ruchardt,Eduard
TI  - Light: visible and invisible 
T2  - Ann Arbor science library
U1  - 535 23
PY  - 1958///
CY  - Ann Arbor
PB  - University of Michigan Press
KW  - Light
KW  - Waves
N1  - Includes Indexes
ER  -