प्राइमरी डाटा एंड सेकेंडरी डाटा क्या है - Primary Data and Secondary Data in Hindi | MyBigGuide - माय बिग गाइड
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Projective Techniques, Methods of Secondary Data Collection -Introduction & Characteristics in Tamil - YouTube
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Why primary data collection is useful in PhD research. List out its advantages over secondary data collection – PhD Assistance
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Primary Data: Data collected by the investigator himself from primary sources is called primary data. It is also termed as original data because it is. - ppt download
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