Thomlinson, Ralph, author
Random House , 1976
Buku Teks
Thomlinson, Ralph
Random House, 1965
Buku Teks
Thomlinson, Ralph
California State University, 1976
Buku Teks
Nam, Charles B.
Hoghton Mifflin., 1976
Buku Teks
D.C U.S.Bureau of the Census , 1980
Buku Teks