1. The Winning of Nickel; Its Geology Mining, and Extractive Metallurgy;Boldt,1967
2. Surface conditions of the Orgueil meteorite parent body as indicated by mineral association;Bostrom;Smithsonian Misc. Collections,1966
3. The Allende meteorite;Clarke;EOS Trans. Amer. Geophys. Union,1969
4. Five years of continuous collection of black, magnetic spherules from the atmosphere;Crozier;J. Geophys. Res.,1962
5. On the presence or absence of nickel in dark magnetic cosmic spherules and their mechanics of origin;Fechtig,1964