Raymond Smith Dugan1878 — 1940 · 5 obras en el catálogoObrasFFurther observations of RT Persei and an attempted explanatiFurther observations of RT Persei and an attempted explanation of the change in periodAA study of certain eclipsing variables for variation of periA study of certain eclipsing variables for variation of periodPPhotometric researchesPhotometric researchesAAstronomyAstronomyAASTRONOMYASTRONOMY
FFurther observations of RT Persei and an attempted explanatiFurther observations of RT Persei and an attempted explanation of the change in period
AA study of certain eclipsing variables for variation of periA study of certain eclipsing variables for variation of period