Astronomers - Biography. - Netherlands

Jacobus Cornelius Kapteyn = born investigator of the heavens / by: (Language materials, printed)

Willem de Sitter = Einstein's friend and opponent / by: (Language materials, printed)

Jan Hendrik Oort = master of the galactic system / by: (Language materials, printed)

History and Philosophical Foundations of Physics.

Popular Science in Physics.

Astronomy, Astrophysics and Cosmology.

Astronomy, Observations and Techniques.

Cosmology.

Sitter, Willem de.

History of Science.

Physics.

Oort, Jan Hendrik.

Astronomers

Kapteyn, J. C.