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Items where Author is "J. A., Utama"
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Article
T. B., Ramadhan and T., Djamaluddin and J. A., Utama (2014) RE-EVALUATION OF HILAAL VISIBILITY CRITERIA IN INDONESIA BY USING INDONESIA AND INTERNATIONAL OBSERVATIONAL DATA. Proceeding of International Conference On Research, Implementation And Education Of Mathematics And Sciences 2014. (Submitted)