@prefix bf: <http://id.loc.gov/ontologies/bibframe/> .
@prefix bflc: <http://id.loc.gov/ontologies/bflc/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

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    bf:extent [ a bf:Extent ;
            rdfs:label "xi, 129 p." ] ;
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            rdf:value "  2006016138" ],
        [ a bf:Isbn ;
            bf:qualifier "pbk. : alk. paper" ;
            rdf:value "9781416604136" ],
        [ a bf:Isbn ;
            bf:qualifier "pbk. : alk. paper" ;
            rdf:value "1416604138" ] ;
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    bf:publicationStatement "Alexandria, VA: Association for Supervision and Curriculum Development, c2006" ;
    bf:title [ a bf:Title ;
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            bf:mainTitle "The essentials of mathematics, grades 7-12" ;
            bf:subtitle "effective curriculum, instruction, and assessment" ] .