Mechem, Floyd
Callaghan & Company, 1952
Buku Teks
Hung, William S.H., author
[Publisher not identified], 1934
Buku Teks
Fyzee, Asaf A.A., author
Oxford University Press, 1960
Buku Teks
Turner, J. W. Cecil
At The University Press, 1952
Buku Teks
Reuschlein, Harold Gill, author
St. Paul Minn, 1990
Buku Teks