Macmillan encyclopedia of sciences : Transportation
New York : Macmillan Library Reference, 1997,
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Macmillan encyclopedia of sciences : Communication
New York : Macmillan Library Reference, 1997,
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Macmillan encyclopedia of sciences : Matter and energi
New York : Macmillan Library Reference, 1997,
 Buku Referensi
Macmillan encyclopedia of sciences : Life on Earth
New York : Macmillan Library Reference, 1997,
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Macmillan encyclopedia of sciences : Plants and animals
New York : macmillan Library reference USA, 1997,
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