Basil Blackwell , 1950
Buku Teks
Tung, Ta-Lin, author
Foreign Languages Press, 1959
Buku Teks
de Lauwe, Chombart, author
Organization for economic co-operation and development , 1960
Buku Teks
Digby, Margaret, author
Basil Blackwell , 1956
Buku Teks
Gullander, Ake
The Iowa State College Press, 1951
Buku Teks