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Isotopes of nitrogen on Mars: Atmospheric measurements by Curiosity's mass spectrometer.
Wong MH, Atreya SK, Mahaffy PN, Franz HB, Malespin C, Trainer MG, Stern JC, Conrad PG, Manning HL, Pepin RO, Becker RH, McKay CP, Owen TC, Navarro-González R, Jones JH, Jakosky BM, Steele A. Wong MH, et al. Among authors: becker rh. Geophys Res Lett. 2013 Dec 16;40(23):6033-6037. doi: 10.1002/2013GL057840. Epub 2013 Dec 9. Geophys Res Lett. 2013. PMID: 26074632 Free PMC article.
Helium and neon abundances and compositions in cometary matter.
Marty B, Palma RL, Pepin RO, Zimmermann L, Schlutter DJ, Burnard PG, Westphal AJ, Snead CJ, Bajt S, Becker RH, Simones JE. Marty B, et al. Among authors: becker rh. Science. 2008 Jan 4;319(5859):75-8. doi: 10.1126/science.1148001. Science. 2008. PMID: 18174437