00665nam a2200205Ia 4500003000900000008004100009020001800050040001600068080001900084100002400103245006500127260003300192300001400225650002400239650002100263650004900284942000700333999001500340952010400355IN-BaIIA211028s9999    xx            000 0 eng d  a0-12-742050-9  cIIA Library  a535.313.6bWEL  aWelford, W. T94754 0aAberrations of the symmetrical optical systemcW. T. Welford  aLondonbAcademic Pressc1974  aix, 240p.  a Aberrations98490  a Optics 97974  aAstronomy and Astrophysics Thesaurus 91143  cBK  c4774d4774  00104070aBANbBANcGENd1975-10-15l0o535.313.6/ WELp5340r2021-11-05w1975-10-15yBKG£ 7.60