ON I'HE COMPARATIYE STADY OF MATHEMATICAL MODELS FOR EARLIEST VISIBILITY OF THE CRESCENT MOON AND THEIR MODIFICATION
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M UI IA MMA D SITA H ID QURESH
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SupeNisor (D..) N.sidddh Khan Prcfesso.. Depadmenr ofMarlEma cs Unive$ity of Karachi
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DOCTOR OF PHILOSOPHY ptder&, Aslrophysics
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unlversity of Kamchi, Kamchi September, 2007