Espin, T. E. (1889). The bright line in the Spectrum of R Cygni.
Chicago Style CitationEspin, T. E. The Bright Line in the Spectrum of R Cygni. 1889.
MLA CitationEspin, T. E. The Bright Line in the Spectrum of R Cygni. 1889.
Warning: These citations may not always be 100% accurate.