# Geomagnetism--Secular variations { "id": "S85079768", "title": "Geomagnetism--Secular variations", "url": "/topics/S85079768", "kind": "topic-directory", "aeo_cohort": "topic-directory", "provider": "lcsh", "revision": "1e85d0db01268c01", "catalogue_revision": "f050b5d4780b1289", "numeric_address": "900790295359537732", "address_version": "morton4x16-v1", "coordinates": [ 0, 20, 18651, 24576 ], "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/sh85079768 No owner-reviewed local answer yet.