Harrison, John Armstrong
Japan's northern frontier : a preliminary study in colonization and expansion with special reference to the relations of Japan and Russia
University of Florida, 1953
 Buku Teks SO
Brazilian art
Ministerio das Relacoes Exteriores do Brazil , 1976
 Buku Teks SO
Baer, Werner
The Brazilian economy : growth and development
Frederick A. Praeger, 1995
 Buku Teks SO
Cole, John W.
The Hidden frontier
Academic Press, 1974
 Buku Teks SO
Dobson, Rosemary
Over the frontier
Angus & Robertson, 1978
 Buku Teks SO