The Encyclopedia Americana : the international reference work, volume 12
Americana Corporation, 1960
Buku Referensi
The Encyclopedia Americana : the international reference work, volume 15
Americana Corporation, 1960
Buku Referensi
The Encyclopedia Americana : the international reference work, volume 18
Americana Corporation, 1960
Buku Referensi
The Encyclopedia Americana : the international reference work, volume 21
Americana Corporation, 1960
Buku Referensi
The Encyclopedia Americana : the international reference work, volume 24
Americana Corporation, 1960
Buku Referensi