The World book encyclopedia : volume 3
World Book, 1985
Buku Referensi
The New book of knowledge : volume 8
Grolier Incorporated, 1997
Buku Referensi
The New book of knowledge : volume 9
Grolier Incorporated, 1997
Buku Referensi
The New book of knowledge : volume 10
Grolier Incorporated, 1997
Buku Referensi
The New book of knowledge : volume 11
Grolier Incorporated, 1997
Buku Referensi