00499nam a2200181Ia 4500003000900000008004100009020001800050040001600068080001200084100001400096245006400110250001200174260004700186300001700233650002500250650002700275700001500302IN-BaIIA211028s9999    xx            000 0 eng d  a0-7503-0917-2  cIIA Library  a52bROY  aRoy, A. E 0aAstronomybprinciples and practicecA. E. Roy and D. Clarke  a4th ed.  aNew DelhibNutech Photolithopraphersc2011  axxiii, 475p.  aAstronomy principles  aObservation techniques  aClarke , D