Description of 20mm automatic gun m/40 in combined carriage m/40 / [AB Bofors ; transl. from the Swedish] Beschouwing over de richtsystemen en de uitvoeringen daarvan, voor het schieten op luchtdoelen, met: 1. klein kaliber mitrailleurs (t/m 8 mm.) 2. zware mitrailleurs (t/m … world's weapons series world's assault rifles (and automatic carbines) / by Daniel D. Musgrave and Thomas B. Nelson Death from above : the german FG42 paratroop rifle / by Thomas Blair Dugelby and R. Blake Stevens machine gun : a modern survey / Terry Gander Johnson rifles and machine guns : the story of Melvin Maynard Johnson, Jr. and his guns