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Spar (platform) - Wikipedia
Spar Platform - Lindy Energy
Spar Platforms - an overview | ScienceDirect Topics
The Spar Platform: A Design That Transformed Deepwater …
World’s largest spar platform opens deepwater production
SPAR Platform - SpringerLink
The Spar Platform: A Design That Transformed Deepwater
Spar (platform) - OilfieldWiki
Spar Platform - GlobalSecurity.org