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    <marc:subfield code="a">, E. U. I. F. Q. C. </marc:subfield>
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    <marc:subfield code="a">  International Fuel Quality Center (IFQC)</marc:subfield>
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            <marc:subfield code="z">Setting a quality standard for fuel ethanol</marc:subfield>
            <marc:subfield code="u">https://www.virtualpro.co/biblioteca/estableciendo-un-estandar-de-calidad-para-alcohol-carburante</marc:subfield>
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