edited by Charles Moritz
H.W. Wilson, 1966
Buku Referensi
edited Marjorie Dent Candee
H.W. Wilson, 1955
Buku Teks
United Nation. Departement of Economic and Social Affairs. Statistical Office
United Nation, 1957
Buku Referensi
edited by Anna Rothe
H.W. Wilson, 1950
Buku Referensi
edited by Anna Rothe
H.W. Wilson, 1947
Buku Referensi