1. Studies in ‘Standard Samples’ for use in the general analysis of silicate rocks and minerals, Part 6. 1979 ‘Useable Values’;Abbey;Geol. Surv. Can., Pap.,1980
2. Relative and absolute terrestrial abundances of the rare earths;Haskin,1968
3. Yttrium and lanthanides, Section C. Abundance in cosmos, meteorites, tektites and lunar specimens; Table 39,57-71C3;Hermann,1970
4. The Palisades diabase of New Jersey;Lewis;Am. J. Sci.,1908
5. Suppression of molecular ions in SIMS spectra of metals and semiconductors;McIntyre;Surf. Interface Anal.,1985