Valves Piping Pipelines Handbook

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http://www.amazon.com/Valves-Piping-Pipelines-Handbook-Third/dp/185617252X

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http://rapidshare.com/files/131371526/Valves__Piping__and_Pipeline_Handbook_opt.pdf

Pipeline Engineering

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http://www.amazon.com/Pipeline-Engineering-Henry-Liu/dp/1587161400/~Censored~pd_bbs_sr_1?ie=UTF8&s=books&qid=1216672507&sr=1-1

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http://rapidshare.com/files/131371758/Pipeline_Engineering.pdf

Trenchless and minimum excavation techniques planning and selection

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http://www.blissbooks.co.uk/Civil-Engineering-Excavation/c21_62/p214/Trenchless-and-Minimum-Excavation-Techniques:-Planning-and-Selection--SP147/product_info.html

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http://rapidshare.com/files/131368393/Trenchless.and.minimum.excavation.techniques.planning.and.selection-CPS.pdf

Horizontal Directional Drilling (HDD) (Civil Engineering)

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http://www.amazon.com/Horizontal-Directional-Drilling-Civil-Engineering/dp/007145473X/~Censored~sr_1_1?ie=UTF8&s=books&qid=1216673329&sr=1-1

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http://rapidshare.com/files/131368330/Horizontal_Directional_Drilling_-_Utility_and_Pipeline_Applications_-_D._Willoughby__McGraw-Hill__20