TY  - BOOK
AU  - Southall,James P.C.
TI  - Mirrors, prisms and lenses : a text-book of geometrical optics 
U1  - 535.32 SOU  
PY  - 1923///.
CY  - New York : 
PB  - Dover Publications, Inc., 
KW  - Geometrical optics.
KW  - Optica geometrica -- Libros de texto.
KW  - Linse.
ER  -