BASIC FIELD MANUAL FM 23-88 60-MM MORTAR, M2
WAR DEPARTMENT  WASHINGTON, JULY 19, 1940
87 STRON, 13 CZARNOBIAŁYCH FOTOGRAFI, 3 RYSUNKI
ROZDZIAŁY:
CHAPTER 1 . MECHANICAL TRAINING
CHAPTER 2 . TRAINING FOR PLACING MORTAR IN ACTION
CHAPTER 3 . MARKSMANSHIP
CHAPTER 4 . TECHNIQUE OF FIRE
CHAPTER 5 . FIRING AT FIELD TARGETS. 
CHAPTER 6 . ADVICE TO INSTRUCTORS