050216 North Pole Expeditions. Sources: 2154 Departure of Peary 1905, 170414 Admiral Peary and Matthew Henson, 0562 Admiral Peary 1920, 0563 Roald Amundsen 1922, 0548 Admiral Byrd expedition 1926, 160086 North Pole expedition 1950s
050196 Hypnosis Compilation. Sources: 0768, BL#62, 1142, 0782, D412, 1168, 1758
070307-0009 Early Aviation, Failures and Successes, USA, 1900s, 1910s
070307-0004 Factories, Factory Workers, USA, 1900s, 1910s