scanjob - psruetheses.psru.ac.th/lib-irpsru/sites/default/files/site/default/thesis/ch3-01_0.pdf ·...
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- ScanJob - PSRUetheses.psru.ac.th/lib-irpsru/sites/default/files/site/default/thesis/ch3-01_0.pdf · 49 1.2.1 63 (Krejcie and Morgan, 1970 2554 42 - 43) 56 1.22 (Stratified Random
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