00513nam a2200157Ia 4500003000900000008004100009040001600050080001600066100001900082245011000101260003500211300001300246490004500259650002300304650002800327IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a535.31bWEL  aWelford, W. T. 0aGeometrical opticsboptical instrumentationcW. T. Welford                                                 aAmsterdambNorth-Hollandc1962  ax, 200p.  aUndergraduate textbooks in physics; v. 1  aGeometrical optics  aOptical instrumentation