Yb 3d CORE-LEVEL PHOTOEMISSION OF YbN, YbP AND YbAs T. GREBER, L. DEGIORGI, R. MONNIER, L. SCHLAPBACH, F. HULLIGER et E. KALDIS J. Phys. Colloques, 48 C9 (1987) C9-943-C9-946 DOI: 10.1051/jphyscol:19879169