George, pp.  368–369: the Japanese 90 mm mortar was in effect a small field piece, firing a heavy projectile to ranges of up to 4000 yards with extreme accuracy due to its especially stable mount.
George, pp. 368-369: den japanske 90 mm morter var i praksis en lille kanon, som kunne skyde projektiler op til 3,5 km væk med ekstrem præcision på grund af sit særligt stabile fundament.