@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/532a8068-51a4-4184-ae77-a353e731ed8a> a bf:Instance ;
    bf:adminMetadata [ a bf:AdminMetadata ;
            bf:agent <http://id.loc.gov/vocabulary/organizations/cbc> ;
            bf:date "2026-09-11T20:28:24.199932+00:00"^^xsd:dateTime ;
            bf:derivedFrom <http://id.loc.gov/resources/instances/11156352> ;
            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 "23 volumes" ;
            bf:note [ a bf:Note,
                        <http://id.loc.gov/vocabulary/mnotetype/physical> ;
                    rdfs:label "illustrations" ] ] ;
    bf:frequency [ a bf:Frequency ;
            rdfs:label "Semimonthly" ;
            bf:date "1962-" ;
            bf:status <http://id.loc.gov/vocabulary/mstatus/former> ],
        [ a bf:Frequency ;
            rdfs:label "Weekly" ;
            bf:date "-1966" ;
            bf:status <http://id.loc.gov/vocabulary/mstatus/current> ],
        <http://id.loc.gov/vocabulary/frequencies/wkl> ;
    bf:identifiedBy [ a bf:Local ;
            bf:source <http://id.loc.gov/vocabulary/organizations/de-101> ;
            rdf:value "97682860X" ],
        [ a bf:Local ;
            bf:source <http://id.loc.gov/vocabulary/organizations/dnlm> ;
            rdf:value "P14760000" ],
        [ a bf:Local ;
            bf:source <http://id.loc.gov/vocabulary/organizations/de-101> ;
            rdf:value "010678158" ],
        [ a bf:Coden ;
            rdf:value "PYLBAJ" ],
        [ a bf:Local ;
            bf:source <http://id.loc.gov/vocabulary/organizations/dnlm> ;
            rdf:value "9875584" ],
        [ a bf:Lccn ;
            rdf:value "   64004555 " ],
        [ a bf:Local ;
            bf:source <http://id.loc.gov/vocabulary/organizations/uk> ;
            rdf:value "012754705" ] ;
    bf:instanceOf <https://stage.bcld.info/works/b45023ed-6463-4fb8-859d-fe19bfe7fcdd> ;
    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/index> ;
            rdfs:label "Vols. 1-20; 1962-1966. 1 v." ],
        [ a bf:Note,
                <http://id.loc.gov/vocabulary/mnotetype/number> ;
            rdfs:label "v. 1-23; Apr. 1962-1966." ] ;
    bf:provisionActivity [ a bf:ProvisionActivity,
                bf:Publication ;
            bflc:simpleAgent "North-Holland Pub. Co." ;
            bflc:simplePlace "Amsterdam" ;
            bf:date "1962/1966"^^<http://id.loc.gov/datatypes/edtf> ;
            bf:place <http://id.loc.gov/vocabulary/countries/ne> ;
            bf:status <http://id.loc.gov/vocabulary/mstatus/ceased> ] ;
    bf:publicationStatement "Amsterdam: North-Holland Pub. Co." ;
    bf:title [ a bf:Title ;
            bf:mainTitle "Physics letters" ] .