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.

Physics.

Oort, Jan Hendrik.

Astronomers

Popular Science in Physics.

Kapteyn, J. C.

Cosmology.

Sitter, Willem de.

Astronomy, Astrophysics and Cosmology.

History of Science.

Astronomy, Observations and Techniques.