https://marine.copernicus.eu/da/services/markets/education/emily-penn-exxpedition
Emily Penn Ekspedition | CMEMS
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https://researchprofiles.ku.dk/en/publications/vtoraia-kamchatskaia-ekspeditsiia-dokumenty-1734-1736-morskie-otr/
Anden Kamtjatka-ekspedition. Dokumenter 1734-1736: Marine-detachementerne - University of...
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