The cross-staff

<https://id.rijksmuseum.nl/30031814>

schema:name	"The cross-staff"
schema:creator	Mörzer Bruyns, W.F.J.
schema:position	"1994"
schema:about	maritieme geschiedenis
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schema:isPartOf	Jaarboek / Vereeniging Nederlandsch Historisch Scheepvaart Museum ;
schema:workExample	The cross-staff: history and development of a navigational instrument

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