{"id":"002033682","type":"article","title":"Die Höhlen- oder Grottenburgen","publisher":"Europäisches Burgeninstitut","publisher-place":"Braubach","pages":"116-119","container-title":"Burgen und Schlösser, 61,2 (2020","author":[{"family":"Bitterli","given":"Thomas"}],"issued":{"raw":"2020"}}