TY - JOUR AU - D. Hils AU - John Hall BT - Physical Review Letters DA - Jan-04-1990 DO - 10.1103/PhysRevLett.64.1697 PY - 1990 SP - 1697 EP - 1700 T2 - Physical Review Letters TI - Improved Kennedy-Thorndike experiment to test special relativity VL - 64 SN - 0031-9007 ER -