{"id":"S2012000036","label":"Gases--Migration","description":"Here are entered works on the movement of underground gases from a natural source or engineered storage and barrier system upward toward the surface of the Earth. Works on the movement of a gas through closed or open channels or conduits are entered under [Gas flow.]","source_url":"https://id.loc.gov/authorities/subjects/sh2012000036","normalized_label":"gases--migration","broader":["http://id.loc.gov/authorities/subjects/sh2011004991","http://id.loc.gov/authorities/subjects/sh85049398"],"aliases":["Gas migration","Migration of gases"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2012000036","provider":"lcsh","revision":"61bb5177cd935917","taxonomy_revision":"f050b5d4780b1289","title":"Gases--Migration","url":"/topics/S2012000036","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"13856450438628795938","address_version":"morton4x16-v1","coordinates":[0,479,45756,36864],"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}