Observing by Hand: Sketching the Nebulae in the Nineteenth CenturyCărți electroniceObserving by Hand: Sketching the Nebulae in the Nineteenth CenturydinOmar W. NasimEvaluare: 3 din 5 stele3/5Salvați Observing by Hand: Sketching the Nebulae in the Nineteenth Century pentru mai târziu