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Obaya, Adolfo V., Instituto Superior de Estudios Superiores de Monterrey, Campus Estado de México
Obaya-Valdivia, Adolfo E. , Department of Chemistry, La Facultad de Estudios Superiores Cuautitlán [The Faculty of Higher Studies, Cuautitlán] Universidad Nacional Autónoma de México [National Autonomous University of Mexico], Campus 1, Mexico City, Mexico.
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Oppong, Emmanuel K, Department of Chemistry Education, University of Education, Winneba, Ghana
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Osman, Kamisah, The National University of Malaysia (UKM)
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