Birdsall, Stephen S., author
Garis besar geografi Amerika dan Kanada
John Wiley & Sons, 1992
 Buku Teks SO
Birdsall, Stephen S., author
Garis besar : geografi Amerika = Outline of American geography
John Wiley & Sons, 1992
 Buku Teks SO
Garis besar sejarah Amerika
[publisher not identified], [date of publication not identified]
 Buku Teks
Garis besar : sejarah Amerika
[Publisher not identified], [Date of publication not identified]
 Buku Teks
McCan, Robert L., author
Garis besar ekonomi Amerika
Dinas Penerangan Amerika Serikat Kedutaan Besar Amerika Serikat, 1991
 Buku Teks
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