Levin, Harvey J.
Rinehard & Comp, Inc , 1959
Buku Teks
Isaacs, Asher, 1902-1963, author
Van Nostrand , 1964
Buku Teks
Shepherd, William G., author
Richard D. Irwin, 1979
Buku Teks
Dimock, Marshall Edward, author
Henry Holt, 1953
Buku Teks
Koontz, Harold, author
McGraw-Hill, 1956
Buku Teks