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	1.	No cover image available Cost evaluation of a metal and mineral recovery process for treating municipal incinerator residues / by John J. Henn and Frank A. Peters by Henn, John J Peters, Frank A [jt. aut] United States. Department of Interior Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Washington, D.C. : U.S. Government Printing Office, 1971 Availability: Items available for loan: National Library of India (1)Call number: U.S 338.20973021 H 39. Place hold Save to lists
	2.	No cover image available A review of proposed processes for making rutile substitutes / by John J. Henn and James A. Barclay by Henn, John J Barclay, James A [jt. aut] United States. Department of Interior Series: United States Bureau of Mines : Information circular ; 8450 Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Washington, D.C. : U.S. Dept. of Interior, 1970 Availability: Items available for loan: National Library of India (1)Call number: U.S 666.86 H 39. Place hold Request article Save to lists

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