@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#> .

<https://stage.bcld.info/instances/6c81bdc3-4e14-4a73-b95f-8bcab59f978a> a bf:Instance ;
    bf:adminMetadata [ a bf:AdminMetadata ;
            bf:agent <http://id.loc.gov/vocabulary/organizations/cbc> ;
            bf:date "2026-09-11T20:20:14.086857+00:00"^^xsd:dateTime ;
            bf:derivedFrom <http://id.loc.gov/resources/instances/11163079> ;
            bf:status <http://id.loc.gov/vocabulary/mstatus/c> ],
        [ a bf:AdminMetadata ;
            bflc:catalogerId "Unknown" ;
            bf:date "2026-09-11" ;
            bf:descriptionAuthentication <http://id.loc.gov/vocabulary/marcauthen/pcc> ;
            bf:descriptionLanguage <http://id.loc.gov/vocabulary/languages/eng> ;
            bf:descriptionLevel <http://id.loc.gov/ontologies/bibframe-2-6-0/> ] ;
    bf:carrier <http://id.loc.gov/vocabulary/carriers/nc> ;
    bf:dimensions "27 cm" ;
    bf:extent [ a bf:Extent ;
            rdfs:label "volumes" ;
            bf:note [ a bf:Note,
                        <http://id.loc.gov/vocabulary/mnotetype/physical> ;
                    rdfs:label "illustrations" ] ] ;
    bf:frequency [ a bf:Frequency ;
            rdfs:label "Weekly" ;
            bf:date "<Dec. 2004->" ;
            bf:status <http://id.loc.gov/vocabulary/mstatus/current> ],
        [ a bf:Frequency ;
            rdfs:label "Frequency varies" ;
            bf:date "1967-" ;
            bf:status <http://id.loc.gov/vocabulary/mstatus/former> ],
        <http://id.loc.gov/vocabulary/frequencies/wkl> ;
    bf:identifiedBy [ a bf:Lccn ;
            rdf:value "   71000076 " ],
        [ a bf:Local ;
            bf:source <http://id.loc.gov/vocabulary/organizations/dnlm> ;
            rdf:value "8407789" ],
        [ a bf:Local ;
            bf:source <http://id.loc.gov/vocabulary/organizations/dnlm> ;
            rdf:value "P14800000" ],
        [ a bf:Coden ;
            rdf:value "PYLBAJ" ],
        [ a bf:Local ;
            bf:source <http://id.loc.gov/vocabulary/organizations/uk> ;
            rdf:value "007862956" ],
        [ a bf:PostalRegistration ;
            bf:assigner [ a bf:Organization ;
                    rdfs:label "USPS" ] ;
            rdf:value "008691" ] ;
    bf:instanceOf <https://stage.bcld.info/works/cd834234-38a3-4777-82bf-b2cbe7857d37> ;
    bf:issuance <http://id.loc.gov/vocabulary/issuance/serl> ;
    bf:media <http://id.loc.gov/vocabulary/mediaTypes/n> ;
    bf:note [ a bf:Note,
                <http://id.loc.gov/vocabulary/mnotetype/number> ;
            rdfs:label "v. 24B- Jan. 9, 1967-" ],
        [ a bf:Note ;
            rdfs:label "Title varies slightly." ],
        [ a bf:Note,
                <http://id.loc.gov/vocabulary/mnotetype/index> ;
            rdfs:label "Vols. 24B-50B, 1967-1974, as v. 54B (includes index for Physics letters, v. 21-23)." ],
        [ a bf:Note,
                <http://id.loc.gov/vocabulary/mnotetype/index> ;
            rdfs:label "Master index: v. 401-410. 1 v.; v. 411-420. 1 v.; v. 441-450. 1 v.; v. 451-460. 1 v." ] ;
    bf:provisionActivity [ a bf:ProvisionActivity,
                bf:Publication ;
            bflc:appliesTo [ a bflc:AppliesTo ;
                    rdfs:label "1967-" ] ;
            bflc:simpleAgent "North-Holland Pub. Co." ;
            bflc:simplePlace "Amsterdam" ;
            bf:status <http://id.loc.gov/vocabulary/mstatus/earliest> ],
        [ a bf:ProvisionActivity,
                bf:Publication ;
            bflc:simpleAgent "Elsevier" ;
            bflc:simplePlace "Amsterdam" ;
            bf:date "1967/.."^^<http://id.loc.gov/datatypes/edtf> ;
            bf:place <http://id.loc.gov/vocabulary/countries/ne> ;
            bf:status <http://id.loc.gov/vocabulary/mstatus/current> ] ;
    bf:publicationStatement "Amsterdam: Elsevier",
        "Amsterdam: North-Holland Pub. Co." ;
    bf:title [ a bf:Title ;
            bf:mainTitle "Physics letters" ;
            bf:partNumber "B." ] .