The shock and vibration bulletin 48 pt.4 The shock and vibration bulletin 41 pt.4 The shock and vibration bulletin 47 pt.4 The shock and vibration bulletin 48 pt.1 The shock and vibration bulletin 48 pt.2 The shock and vibration bulletin 48 pt.3 The shock and vibration bulletin 41 pt.2 The shock and vibration bulletin 41 pt.3 The shock and vibration bulletin 41 pt.5 The shock and vibration bulletin 41 pt.6