TY - JOUR AU - A. Brillet AU - John Hall BT - Physical Review Letters DA - Jan-02-1979 DO - 10.1103/PhysRevLett.42.549 PY - 1979 SP - 549 EP - 552 T2 - Physical Review Letters TI - Improved Laser Test of the Isotropy of Space VL - 42 SN - 0031-9007 ER -