by F.H. Seares, J.C. Kapteyn and P.J. van Rhijn ; assisted by Mary C. Joyner and Myrtle L. Richmond

Carnegie Institution of Washington 1930 Carnegie Institution of Washington publication no. 402 , Papers of the Mount Wilson Observatory v. 4

所蔵館4館

by J.C. Kapteyn

Publisched by the Astronomical Laboratory at Groningen , Hoitsema 1911

所蔵館1館

by J.C. Kapteyn

Published by the Astronomical Laboratory at Groningen , Hoitsema 1906

所蔵館2館

by J.C. Kapteyn

P. Noordhoff [1903]-1916

[1st paper] , 2nd paper

所蔵館6館

par J.C. Kapteyn et W. Kapteyn

J. Müller 1885

所蔵館1館