1
Published: 1929
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 62
2
Published: 2016.
Superior document: Journal of Philosophy of Education Book Series
3
Published: 1948
Superior document: Publications of the Leander McCormick Observatory 10
4
Published: 1929
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 55
5
6
Other Authors:
“...Williams, Emma,...”
7
Published: 2021
Superior document: Philosophies pratiques