1. Meteorites and the early solar system;Anders;Ann. Rev. Astron. Astrophys.,1971
2. Mass Spectrum of gallium vapor;Antkiw;J. Chem. Phys.,1953
3. The isotopic constitution and atomic weights of hafnium, thorium, rhodium, titanium, zirconium, calcium, gallium, silver, carbon, nickel, cadmium, iron and indium;Aston,1935
4. Determination of copper, gallium and zinc in standard rocks by neutron activation;Brunfelt;Anal. Chim. Acta,1967
5. On the feasibility of NBS 70a K-feldspar as a Rb-Sr age reference sample;Compston;Geochim. Cosmochim. Acta,1969