Sellery, G. C.
Madison: University of Wisconsin Press, 1950
Buku Teks
Hutton, J.H.
Cambridge University Press , 1946
Buku Teks
Dyson, Freeman J., author
Cambridge University Press, 1999
Buku Teks
Vernadsky, George
At The Clarendon Press, 1959
Buku Teks
Arendt, Hannah, 1906-1975, author
Harcourt, Brace, 1950
Buku Teks