TY - JOUR AU - K. German AU - Richard Zare BT - Physical Review Letters DA - Jan-11-1969 DO - 10.1103/PhysRevLett.23.1207 PY - 1969 SP - 1207 EP - 1209 T2 - Physical Review Letters TI - Optical Radio-Frequency Double Resonance in Molecules: The OH Radical VL - 23 SN - 0031-9007 ER -