استانداردها

BSI - British Standards Institution (147)

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

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

APHA,American Public Health Association (3)

AWWA,American Water Works Association (3)

WEF,Water Environment Federation (3)

ETSI - European Telecommunications Standards Institute (2)

2000 - 2025 (11679)

1922 - 1999 (980)