# Umkehr effect

{
  "id": "S85139543",
  "title": "Umkehr effect",
  "url": "/topics/S85139543",
  "kind": "topic-directory",
  "aeo_cohort": "topic-directory",
  "provider": "lcsh",
  "revision": "61ff8e4a9b93e11e",
  "catalogue_revision": "f050b5d4780b1289",
  "numeric_address": "867167229714760196",
  "address_version": "morton4x16-v1",
  "coordinates": [
    0,
    20,
    19585,
    23552
  ],
  "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/sh85139543

No owner-reviewed local answer yet.