Define Indirect Oral Investigation.

The topic of Indirect Oral Investigation along with other data collection methods have been extensively covered in the study material provided on our site. Go through the link provided below and in case of any difficulty, do get back to us.

http://cbse.meritnation.com/cbse-economics-statistics-for-economics/collection-of-data/443/2494/studymaterials.html#6418

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