(1921). Astronomičeskij ežegodnik: = Astronomical yearbook. IPA.
Chicago Style (17th ed.) CitationAstronomičeskij Ežegodnik: = Astronomical Yearbook. Sankt-Peterburg: IPA, 1921.
MLA (9th ed.) CitationAstronomičeskij Ežegodnik: = Astronomical Yearbook. IPA, 1921.
Warning: These citations may not always be 100% accurate.