Polar Bear Expedition Digital Archival CollectionMain MenuIntroductionContextTimelineMapAll Archive ItemsResourcesSelected additional resources for further information and research.Angela Schöpkea9b85985047875065a895f217f6d9371b9e08ba7Natalia Holtzman3bc8196281034c0edcbedc5566da15e84a149850Robert Pfaff26e53fe8d0a26f48a7d0471c72f29e971c17bb65