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SUNDAY A, MATTHEW A. STUDENTS’ SELF-CONCEPT AS CORRELATES OF THEIR ACHIEVEMENT IN SENIOR SECONDARY SCHOOL MATHEMATICS IN ANKPA LOCAL GOVERNMENT AREA OF KOGI STATE, NIGERIA. JOGRESS [Internet]. 18Feb.2019 [cited 21Oct.2019];12(4):202-15. Available from: http://www.ikprress.org/index.php/JOGRESS/article/view/4427