The World book encyclopedia : volume 6
World Book, 1985
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The World book encyclopedia
World Book, 1992
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The New book of knowledge : volume 6
Grolier Incorporated, 1997
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The World book encyclopedia : volume 1, A
Field Enterprises Educational Corporation, 1963
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The World book encyclopedia : volume 16, S
Field Enterprises Educational Corporation, 1963
Buku Referensi