Plans for Public Utilities, Water Resources and Long-distance Lines; Plans for Long-distance Pipelines, Technical Regulation of the DVGW (German Gas and Water Engineers Association)— 11 стр.
Gravity drainage systems inside buildings - Part 5: Installation and testing, instructions for operation, maintenance and user; German version EN 12056-5:2000— 10 стр.
Writing paper and certain classes of printed matter - Trimmed sizes - A and B series, and indication of machine direction (ISO 216:2007); German version EN ISO 216:2007— 12 стр.