استانداردها

BSI - British Standards Institution (1940)

ETSI - European Telecommunications Standards Institute (302)

IEEE - The Institute of Electrical and Electronics Engineers, Inc. (121)

AASHTO - American Association of State Highway and Transportation Officials (28)

APHA,American Public Health Association (3)

AWWA,American Water Works Association (3)

WEF,Water Environment Federation (3)

American Water Works Association (AWWA) (1)

2000 - 2025 (91672)

1922 - 1999 (10028)