1. Messung und Deutung relativer Haufigkeitsvariationen von O18 und C13 in Karbonatgesteinen und Mineralen;Baertschi;Schweiz. Mineral. Petrogr. Mitt.,1957
2. Gas adsorption on crushed quartz and basalt;Barker;Geochim. Cosmochim. Acta,1975
3. Nitrogen isotopic ratios of individual diamond samples;Becker,1982
4. Nitrogen abundances and isotopic compositions in lunar samples;Becker,1975
5. Nitrogen isotopes in igneous rocks;Becker;EOS,1977