TY - JOUR PB - American Physical Society ID - 10.1103/PhysRevFocus.19.1 TI - The Case of the Disappearing Mass JF - Physical Review Focus JA - Phys. Rev. Focus J1 - FOCUS VL - 19 IS - SP - 1 EP - PY - 2007/01/11/ UR - http://link.aps.org/doi/10.1103/PhysRevFocus.19.1 A1 - Inman, Mason ER -