Pedersen geweer / [tekst: Bas Martens ; foto's: Springfield Armory National Historic Site/ National Park Service (SANHS/NPS), Rock Island Auctions, Amoskeag Auction Company, U.S. Patent … U.S. Lee Navy geweer / [tekst: Bas Martens ; foto's: Bas Martens, Wikimedia Commons, Bruce Canfield, Morphy Auctions en het U.S. Patent Office] Reising pistoolmitrailleurs / [tekst: Bas Martens ; foto's: U.S. Patent Office, U.S. National Achives, Rock Island Auction, Long Mountain Outfitters, publiek romein - (sic)]
