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	21.	No cover image available Beneficiation of Low Grade Manganese Ores of India by P I A Narayanan and N N Subrahmanyan by Narayanan, P I A Subrahmanyan, N N Material type: Text Publication details: New Delhi Council of Scientific & Industrial Research 1959 Availability: No items available.
	22.	No cover image available Beneficiation of Low Grade Manganese Ores of India by P I A Narayanan and N N Subrahmanyan by Narayanan, P I A Subrahmanyan, N N Material type: Text Publication details: New Delhi Council of Scientific & Industrial Research 1959 Availability: No items available.
	23.	No cover image available Structure of electro deposited manganese : by Dhananjayan, N Banerjee, T [author] Material type: Text; Format: print ; Literary form: Not fiction Publication details: Jamshedpur : National Metallurgical Laboratory, 1969 Availability: No items available.

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