General history
http://www.jaegerkorps.org/NRA/Dutch%20Arms%20in%20the%20American%20Revolution.htm (http://www.jaegerkorps.org/NRA/Dutch%20Arms%20in%20the%20American%20Revolution.htm)
http://www.americanrifleman.org/ArticlePage.aspx?cid=1&id=1935 (http://www.americanrifleman.org/ArticlePage.aspx?cid=1&id=1935)
http://nramuseum.com/the-museum/the-galleries/the-road-to-american-liberty/case-19-musket,-rifle-fowler/dutch-english-flintlock-fowler.aspx (http://nramuseum.com/the-museum/the-galleries/the-road-to-american-liberty/case-19-musket,-rifle-fowler/dutch-english-flintlock-fowler.aspx)
http://www.americanrifleman.org/GalleryItem.aspx?cid=22&gid=33&id=196 (http://www.americanrifleman.org/GalleryItem.aspx?cid=22&gid=33&id=196)
Liege Arms
http://www.jcs-group.com/military/plymouth/service2.html (http://www.jcs-group.com/military/plymouth/service2.html)
Suhl Arms
http://www.christies.com/LotFinder/lot_details.aspx?intObjectID=4833538 (http://www.christies.com/LotFinder/lot_details.aspx?intObjectID=4833538)
http://en.wikipedia.org/wiki/Suhl (http://en.wikipedia.org/wiki/Suhl)