{"id":"S2021000431","label":"Information storage and retrieval systems--Electron impact ionization","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2021000431","normalized_label":"information storage and retrieval systems--electron impact ionization","broader":[],"aliases":["Electron impact ionization--Information storage and retrieval systems"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2021000431","provider":"lcsh","revision":"456f4b4529272f08","taxonomy_revision":"f050b5d4780b1289","title":"Information storage and retrieval systems--Electron impact ionization","url":"/topics/S2021000431","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14162914839661641798","address_version":"morton4x16-v1","coordinates":[0,481,55315,48128],"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}