Paskaerte van de Oosterse en Noordse Schipvaert van Nederlandt tot Nova ZemblaBlaeu, Joan, 1596-1673, cartographer[1655]dutBEIN 21 1670A: Manuscript number on verso: 173. Watermark.Depths shown by isolines and soundings.Coordinates not present on map and are approximated.From Blaeu's De groote Zee-spiegel (Amsterdam, 1655).