Thank you for viewing. I was a railway consultant, but I have retired and am selling these items. I purchased these during my consulting days so I could work remotely, but I ended up not using them much, so they are relatively clean. There are no tears, damage, or writing, nor any noticeable stains, but there are some label maker marks. Please understand that these items have been stored by a private individual and are used. If you are not overly concerned about these minor imperfections, please consider purchasing them. Thank you. "Railway Structure Design Standards and Commentary (Concrete Structures) - Part I: Basic Principles / Part II: Bridges" - January 2023 Ministry of Land, Infrastructure, Transport and Tourism Railway Bureau / Public Interest Incorporated Foundation Railway Technical Research Institute Price: ¥13,000 "Railway Structure Design Standards and Commentary (Concrete Structures) - Part IV: Bearing Structures" - January 2023 Ministry of Land, Infrastructure, Transport and Tourism Railway Bureau / Public Interest Incorporated Foundation Railway Technical Research Institute Price: ¥7,000 #Ministry of Land, Infrastructure, Transport and Tourism Railway Bureau #Public Interest Incorporated Foundation Railway Technical Research Institute #Book #Civil Engineering/Architecture/Civil Engineering #Professional Engineer #Railway