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Document Designation and Title Year Select Item(s) C139 Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes 10 C139 Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes 05 C139 Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes 03 C139 Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes 01 C139 Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes 99 C139 Standard Specification for Concrete Masonry Units For Construction Of Catch Basins And Manholes 73