Bell, F.G.
Butherworth Heinemman, 1976
Buku Teks
Rogers, John J.W.
Harper & Row , 1966
Buku Teks
Obruchev, V.
Foreign Languages Pub. House, 1959
Buku Teks
Gilluly, James, author
W.H. Freeman, 1959
Buku Teks
Gilluly, James, author
W H Freeman, 1968
Buku Teks