OPTICAL-OPTICAL DOUBLE RESONANCE EXPERIMENTS WITH GALLIUM AND INDIUM ATOMS VIA OPTOGALVANIC DETECTION H.-O. Behrens, G.H. Guthöhrlein et A. Kasper J. Phys. Colloques, 44 C7 (1983) C7-239-C7-250 DOI: 10.1051/jphyscol:1983720