"disused"=>"yes","ref"=>"K630","resource"=>"limestone"
"disused"=>"yes","name:nl"=>"Julianagroeve","ref"=>"K730"
"ref"=>"L220","disused"=>"yes"
"ref"=>"L660","disused"=>"yes"
"ref"=>"G550","disused"=>"yes"
"ref"=>"L750","disused"=>"yes"
"ref"=>"H450","disused"=>"yes"