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Einstein A. TIME, SPACE, AND GRAVITATION. Science. 1920;51(1305):8-10doi: 10.1126/science.51.1305.8.
Einstein, A. (1920). TIME, SPACE, AND GRAVITATION. Science (New York, N.Y.), 51(1305), 8-10. https://doi.org/10.1126/science.51.1305.8
Einstein, A. "TIME, SPACE, AND GRAVITATION." Science (New York, N.Y.) vol. 51,1305 (1920): 8-10. doi: https://doi.org/10.1126/science.51.1305.8
Einstein A. TIME, SPACE, AND GRAVITATION. Science. 1920 Jan 02;51(1305):8-10. doi: 10.1126/science.51.1305.8. PMID: 17820331.
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