national certification examination
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H-INDEX
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2019 ◽
Vol 5
(2)
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pp. 103-110
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2015 ◽
Vol 26
(4)
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pp. 187-192
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2002 ◽
Vol 13
(2)
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pp. 81-86
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1997 ◽
Vol 42
(4)
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pp. 349-354
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1995 ◽
Vol 40
(1)
◽
pp. 19-25
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1989 ◽
Vol 34
(2)
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pp. 71-74
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