Durchmusterung of selected areas
Subtitle: [delta] = -15⁰ and -30⁰ : systematic plan
By: by Edward C. Pickering, J.C. Kapteyn and P.J. van Rhijn
Contributors: Kapteyn, J. C. (Jacobus Cornelius), 1851-1922; Rhijn, P. J. van (Pieter Johannes), 1886-
Series: Annals of the Astronomical Observatory of Harvard College -- v. 102
Publisher: Dijkhuizen & Van Zanten
Published: 1923
Place of publication: Groningen
Language: eng
Number of pages: 276
Subjects: Stars; Catalogs
Notes: Chiefly tables.

On t.p., delta appears as a Greek letter.