TY  - BOOK
AU  - Welford, W. T
TI  - Aberrations of optical systems
SN  - 9780852745649
U1  - 535.33 WEL 
PY  - 1989///, c1986
CY  - Bristol
PB  - A. Hilger
KW  - Aberration
KW  - Geometrical optics
KW  - Optical instruments - Design and construction
N1  - Includes bibliographical reference and index
ER  -