Isotopic ``fingerprints'' for natural uranium ore samples Richter, S. ; Alonso, A. ; De Bolle, W. ; Wellum, R. ; Taylor, P. D. P. Abstract Publication: International Journal of Mass Spectrometry Pub Date: October 1999 DOI: 10.1016/S1387-3806(99)00102-5 Bibcode: 1999IJMSp.193....9R