First and second report on the progress of the plan of selected areas / by J.C. Kapteyn,... ; Published by the Astronomical laboratory at Groningen

Date :

Editeur / Publisher : Groningen : Hoitsema brothers , 1911

Type : Livre / Book

Langue / Language : anglais / English

Astronomie -- Observations

Étoiles -- Observations

The Kapteyn Astronomical laboratory (Groningen, Pays-Bas) (Editeur scientifique / editor)