[en] [Gutenberg 52869] • On the Connexion of the Physical Sciences Cambridge University Press
[en] Queen of Science Canongate Books
[en] [Gutenberg 61652] • Physical Geography Arkose Press
[en] [Gutenberg 52869] • On the Connexion of the Physical Sciences Cambridge University Press
[en] Queen of Science Canongate Books
[en] [Gutenberg 61652] • Physical Geography Arkose Press