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Frederick Diana L. Graphical trajectory compendium of caliber. 50 and 20 mm projectiles in an air to ground and ground to ground role
(Фредерик Диана Л. Средства графического отражения траекторий боеприпасов калибров .50 и 20 мм при стрельбе «воздух – земля» и « земля – земля »)
Scientific report. –Philadelphia.: Frankford arsenal. 1973. – 168 p.
This report is a compendium of trajectories in air to ground and ground to ground role of projectile shapes of possible interest in cannon caliber ammunition applications. The 20Ж projectiles shapes are M53, M56 and SAPI. The caliber 50 drag curves are the M2 end M8.