00407nam a2200133Ia 4500003000900000008004100009040001600050100001600066245011100082260003000193650001400223650002000237650001600257IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  aBaker, J.G. 0aOptical systems for astronomical photographycJ. G. Baker                                                   bScientific Americanc1949  aAstronomy  aOptical systems  aphotography