An inter-laboratory assessment of the thorium isotopic composition of synthetic and rock reference materials

Kenneth W.W. Sims, James B. Gill, Anthony Dosseto, Dirk L. Hoffmann, Craig C. Lundstrom, Ross W. Williams, Lary Ball, Darren Tollstrup, Simon Turner, Julie Prytulak, Justin J.G. Glessner, J. J. Standish, Tim Elliott