TY  - BOOK
AU  - Huygens,Christiaan,1629-1695
AU  - Thompson,Silvanus P.,1851-1916
AV  - QC 
PY  - 2005///
PB  - Project Gutenberg
KW  - Wave theory of light
KW  - Refraction, Double
N1  - Project Gutenberg; Freely available; Electronic text
UR  - http://www.gutenberg.org/etext/14725
UR  - http://www.gutenberg.org/license
ER  -