Hyperfine structure and isotope shifts in 733.2 nm mixed forbidden line of Pb I T. J. Wąsowicz, R. Drozdowski and J. Kwela Eur. Phys. J. Special Topics, 144 (2007) 185-189 Published online: 14 June 2007 DOI: 10.1140/epjst/e2007-00125-8