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भारतवाणी
bharatavani  
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Knowledge through Indian Languages
Bharatavani

Paribhasha Kosh (Arthmiti, Janankiki, Ganitiya Arthshastra Aur Aarthik Sankhyiki) (Hindi-English)

ऋणात्मक प्रतिपुष्टि
Negative feed back

ऋतुनिष्ठ विचरण
Seasonal variation


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