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1 | Rational use of water and its treatment in the chemical industry / Economic Commission for Europe. — New York : United Nations, 1991. — 78 p. : tab. ; 30 cm. — ( ECE/CHEM/78) |
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1 | Rational use of water and its treatment in the chemical industry / Economic Commission for Europe. — New York : United Nations, 1991. — 78 p. : tab. ; 30 cm. — ( ECE/CHEM/78) |