Library Science · Information Sources
निम्नलिखित में से कौन सा सूचना का एक गैर-दस्तावेजी स्रोत (non-documentary source) नहीं है?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1इंटरनेट
- 2उत्पाद बुलेटिन (Product bulletins)✓
- 3विस्तार कार्यकर्ता (Extension workers)
- 4डेटाबेस विक्रेता
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उत्पाद बुलेटिन (Product bulletins)
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