Tohutoro APA (7th ed.)
Eichhorn, H. (1971). On the direct Use of spherical coordinates in photographic astrometry. Univ.-Sternwarte; Dümmler i.Komm.
Tohutoru Kātū Chicago (17th ed.)
Eichhorn, Heinrich. On the Direct Use of Spherical Coordinates in Photographic Astrometry. Wien; Bonn: Univ.-Sternwarte; Dümmler i.Komm, 1971.
Tohutoro MLA (9th ed.)
Eichhorn, Heinrich. On the Direct Use of Spherical Coordinates in Photographic Astrometry. Univ.-Sternwarte; Dümmler i.Komm, 1971.
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