# Iron alloys--Brittleness { "id": "S2010006823", "title": "Iron alloys--Brittleness", "url": "/topics/S2010006823", "kind": "topic-directory", "aeo_cohort": "topic-directory", "provider": "lcsh", "revision": "3d3e9a08d9b2ede4", "catalogue_revision": "f050b5d4780b1289", "numeric_address": "9244984063750972962", "address_version": "morton4x16-v1", "coordinates": [ 0, 479, 14612, 39936 ], "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/sh2010006823 No owner-reviewed local answer yet.