ABSORPTION AND POLARIZATION LABELING SPECTROSCOPY OF THE D1Πu-X1Σ+g TRANSITION OF Na2 P. NIAY, P. BERNAGE and H. BOCQUET J. Phys. Colloques, 48 C7 (1987) C7-637-C7-642 DOI: 10.1051/jphyscol:19877154