00553oas 2200193z- 450 991014703460332120180518142834.0(CKB)1000000000525957(DE-599)ZDB2387422-3(EXLCZ)99100000000052595720121018cuuuuuuuu -u- -engExcavation and construction near pipelinesCalgaryNational Energy Board1704-0930 JOURNAL9910147034603321Excavation and construction near pipelines2235027UNINA