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  "name": "Spiegelreflectiecirkel door Pistor & Martins",
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      "name": "metaal",
      "sameAs": "http://vocab.getty.edu/aat/300010900"
    },
    {
      "@type": "Product",
      "name": "hout"
    },
    {
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      "name": "Pistor & Martins"
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    "address": "Berlijn, Duitsland",
    "latitude": 52.5,
    "longitude": 13.41667,
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  "citation": "Borda, Jean-Charles de, \"Description et usage du cercle de réflexion: avec différentes méthodes pour calculer les observations nautiques\", Paris: Didot, 1816.",
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