استانداردها

BSI - British Standards Institution (100)

IEEE - The Institute of Electrical and Electronics Engineers, Inc. (64)

ETSI - European Telecommunications Standards Institute (26)

American Water Works Association (AWWA) (7)

APHA,American Public Health Association (1)

AWWA,American Water Works Association (1)

WEF,Water Environment Federation (1)

2000 - 2025 (14290)

1922 - 1999 (2979)