http://www.inert-ord.net/usa03a/usa1/
www.firstworldwar.com/weaponry/grenades.htm
www.worldwar1.com/sfusdg.htm
ww1militaria.org/?s=Hand+Grenades
www.firstworldwar.com/weaponry/grenades.htm
www.worldwar1.com/sfusdg.htm
ww1militaria.org/?s=Hand+Grenades