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Darkest Depths and Other Underground Megastructures / The tallest, the biggest, the longest and the deepest - all these amazing megastructures are revealed in this title in detail...with some incredible facts and stats to absorb!

GMD	BOOK
Classification	624 GRA
Publisher	QED Books, London, 2012-04-01
Subject	Underground architecture
Topic	Engineering
ISBN	9781848356566
Additional ISBN	1848356560
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