The Encyclopedia Americana : volume 19
Grolier, 1994
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Grolier academic encyclopedia 19
London: Grolier International, 1991,
Buku Referensi
Pandelwan (bendel 19)
[Publisher not identified], [Date of publication not identified]
Naskah
The Encyclopedia Americana : volume 19
Americana Corporation, 1977
Buku Referensi
The Encyclopedia Americana : volume 19
Americana Corporation, 1964
Buku Referensi