TY  - BOOK
AU  - Heel,A.C.S.van
AU  - Velzel,C.H.F.
TI  - What is light?
T2  - World university library
AV  - QC355 .H533 1968
U1  - 535 
PY  - 1968///]
CY  - New York
PB  - McGraw-Hill
KW  - Optics
KW  - Local
N1  - Translation of Wat is licht?; Bibliography: p. 247
ER  -