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Q.1 (1) સામાજિક સંશોધનના હેતુ દર્શાવનાર વિદ્વાન કોણ છે ?
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Q.2 (2) બાળકો અને નિરક્ષર વ્યક્તિ પાસેથી માહિતી મેળવવા કઈ પ્રયુક્તિ ઉપયોગી છે ?
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Q.3 (3) સહભાગી નિરીક્ષણ શબ્દ સૌપ્રથમ કોણે પ્રયોજ્યો ?