استانداردها

BSI - British Standards Institution (147)

IEEE - The Institute of Electrical and Electronics Engineers, Inc. (6)

APHA,American Public Health Association (4)

AWWA,American Water Works Association (4)

WEF,Water Environment Federation (4)

AASHTO - American Association of State Highway and Transportation Officials (3)

ETSI - European Telecommunications Standards Institute (2)

2000 - 2025 (12008)

1922 - 1999 (1042)