{"id":"S85077970","label":"Lock-in amplifiers","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85077970","normalized_label":"lock-in amplifiers","broader":["http://id.loc.gov/authorities/subjects/sh85004652"],"aliases":["Amplifiers, Lock-in"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85077970","provider":"lcsh","revision":"49424bafafa4ad64","taxonomy_revision":"f050b5d4780b1289","title":"Lock-in amplifiers","url":"/topics/S85077970","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"864902235766015556","address_version":"morton4x16-v1","coordinates":[0,20,18623,18432],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}