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Young Scientist. Volume 14: Looking at Structures   Publication: UK World Book International 1990 Description: 62 pages , 28 cm. Series: Young Scientist .14 Date: 1990 Availability: Items available: (1)

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Young Scientist. Volume 15: Machines at Works   Publication: UK World Book International 1990 Description: 62 pages , 28 cm. Series: Young Scientist .15 Date: 1990 Availability: Items available: (1)

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