TY  - BOOK
AU  - Pieter C. van der Kruit
TI  - Pioneer of Galactic Astronomy: A Biography of Jacobus C. Kapteyn
SN  - 9783030554231
PB  - Springer
UR  - https://link.springer.com/openurl?genre=book&isbn=978-3-030-55423-1
ER  -