{"codelist_number":27,"code_value":"07","description_en":"NAL subject heading","description_fr":"Classification thématique NAL","description_es":null,"notes_en":"US National Agricultural Library subject heading","notes_fr":"Classification thématique de la National Agricultural Library (Etats-Unis)","notes_es":null,"introduced_in_issue":9,"modified_in_issue":null,"deprecated_in_issue":null}