Howorth, Henry H.
Longmans Green, 1880
Buku Teks
Howorth, Henry H.
Longmans, Green, 1927
Buku Teks
Vernadsky, George
Yele University Press, 1953
Buku Teks
Spencer, Frank, author
Pan Books, 1967
Buku Teks SO
Spencer, Frank, author
Pan Books, 1967
Buku Teks SO