https://www.digitaljournal.com/business/oilpatch-alarmed-over-enbridge-mainline-contract-requirements/article/555245
Oilpatch alarmed over Enbridge Mainline contract requirements - Digital Journal
Aug 3, 2019 - Enbridge's Mainline system is Canada's largest pipeline system and is made up of a web of pipelines connecting western Canada's production basins with
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https://www.nber.org/papers/w15060
Learning by Drilling: Inter-Firm Learning and Relationship Persistence in the Texas Oilpatch | NBER
Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings...