00783nam0-22003011i-450-990000551460403321200010100 87201 289 1000055146FED01000055146(Aleph)000055146FED0100005514620001010d--------km-y0itay50------baitay-------001yyFloating drillingequipment and its useRiley SheffieldHoustonGulf Pub.198024 cm257 p.Practical drilling technologyv. 2627Sheffield,RileyITUNINARICAUNIMARCBK99000055146040332105 62 1961412DININDININUNINAING01