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Number of items: 1. Mathis, John Samuel (1956) The abundance of helium relative to hydrogen in the Orion Nebula. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/CB4D-4026. https://resolver.caltech.edu/CaltechETD:etd-06072004-163340 This list was generated on Thu Jul 13 12:07:41 2023 UTC. |