Fine, Nathan J., author
Rand McNally, 1965
Buku Teks
Fine, Nathan J., author
Rand McNally, 1965
Buku Teks
Keedy, Mervin J., author
Addison-Wesley , 1969
Buku Teks
Kenyon, Anne E.
Prentice-Hall, 1969
Buku Teks
McFarland, Dora
Mass. Heath , 1968
Buku Teks