False negative for Erdkunde

https://doi.org/10.3112/erdkunde.1963.01.02 is available from the publisher at https://www.erdkunde.uni-bonn.de/archive/1963/mombasa-in-the-land-and-sea-exchanges-of-east-africa

API:

{
  "best_oa_location": null,
  "data_standard": 2,
  "doi": "10.3112/erdkunde.1963.01.02",
  "doi_url": "https://doi.org/10.3112/erdkunde.1963.01.02",
  "genre": "journal-article",
  "is_oa": false,
  "journal_is_in_doaj": false,
  "journal_is_oa": false,
  "journal_issns": "0014-0015",
  "journal_name": "ERDKUNDE",
  "oa_locations": [],
  "published_date": "1963-01-01",
  "publisher": "Erdkunde",
  "title": "Mombasa in the land and sea exchanges of East Africa",
  "updated": "2018-06-21T14:35:47.900600",
  "year": 1963,
  "z_authors": [
    {
      "family": "van Dongen",
      "given": "Irene S."
    }
  ]
}

ourresearch / oadoi

False negative for Erdkunde #87