M2 4.2-inch mortar - Wikipedia
M30 mortar - Wikipedia
M2 4.2 inch mortar | Military Wiki | Fandom
History of the 4.2" Chemical Mortar
The M2 4.2-Inch Chemical Mortar - Warfare History Network
M30 (4.2-inch / Four-Deuce) 106.7mm Heavy Mortar System - Military Factory
Mortar Facts - 4point2.org
M2 4.2 inch Mortar and Manuals - koreanwaronline.com
U.S. Army Chemical Mortar Battalions
- 某些结果已被删除