# Copper--Oxidation { "id": "S89000632", "title": "Copper--Oxidation", "url": "/topics/S89000632", "kind": "topic-directory", "aeo_cohort": "topic-directory", "provider": "lcsh", "revision": "b5205b9872cd6418", "catalogue_revision": "f050b5d4780b1289", "numeric_address": "9855072253342007874", "address_version": "morton4x16-v1", "coordinates": [ 0, 21, 14378, 57344 ], "answer_status": "Directory metadata; local answer requires separate source review", "truth_status": "Subject descriptor, not a factual answer or a demonstrated knowledge gap" } Directory metadata is not a factual answer or evidence of a global knowledge gap. Source: https://id.loc.gov/authorities/subjects/sh89000632 No owner-reviewed local answer yet.