TY - JOUR AU - James Faller AU - I. Marson BT - Metrologia DA - Jan-01-1988 DO - 10.1088/0026-1394/25/1/008 PY - 1988 SP - 49 EP - 55 T2 - Metrologia TI - Ballistic Methods of Measuring g - the Direct Free-Fall and Symmetrical Rise-and-Fall Methods Compared VL - 25 SN - 0026-1394 ER -