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Document Designation and Title Year Select Item(s) D4378 Standard Practice for In-Service Monitoring of Mineral Turbine Oils for Steam and Gas Turbines 08 D4378 Standard Practice for In-Service Monitoring of Mineral Turbine Oils for Steam and Gas Turbines 03 D4378 Standard Practice for In-Service Monitoring of Mineral Turbine Oils for Steam and Gas Turbines 97