"historic:period"=>"1903","material"=>"concrete","operator"=>"Departement van Oorlog","ref"=>"0.2"
Schinkeldijk 2063 JC, Velserbroek
"architect"=>"Ministerie van Oorlog","collection"=>"yes","format"=>"squared_stone","format:top"=>"flat","inscription"=>"O","material"=>"bluestone","operator"=>"dutch","ref"=>"O 87"
Schinkeldijk 2063 JC, Velserbroek
"architect"=>"Ministerie van Oorlog","collection"=>"yes","format"=>"squared_stone","format:top"=>"flat","inscription"=>"O","material"=>"bluestone","operator"=>"dutch","ref"=>"O 88"
Westlaan 1991 AL, Haarlem
"architect"=>"Ministerie van Oorlog","collection"=>"yes","format"=>"squared_stone","format:top"=>"flat","inscription"=>"O","material"=>"bluestone","operator"=>"dutch","ref"=>"O 91"