Crosland, Anthony, 1918-, author
Macmillan, 1957
Buku Teks
Sinclair, William Angus
Robert Hale, 1955
Buku Teks
Von Mises, Ludwig, 1881-1973, author
Bradford and Dickens, 1953
Buku Teks
Engels, F. E.
Foreign Languages Publishing House, 1958
Buku Teks
Budapest General Statistical ffice 1959
Buku Teks