نظام الوحدات الدولي: الفرق بين النسختين

** [http://www.nist.gov/pml/wmd/metric/upload/NIST-SP-814-Federal-Metric-Policy-1998.pdf NIST Special Pub 814: Interpretation of the SI for the United States and Federal Government Metric Conversion Policy]

* [http://www.sae.org/standardsdev/tsb/tsb003.pdf Rules for SAE Use of SI (Metric) Units]

* [http://www.engnetglobal.com/tips/convert.aspx EngNet Metric Conversion Chart] Online Categorised Metric Conversion Calculator

* [http://lamar.colostate.edu/~hillger/pdf/Practical_Guide_to_the_SI.pdf U.S. Metric Association. 2008. A Practical Guide to the International System of Units]

* [http://www.npl.co.uk/server.php?show=ConWebDoc.1835 ''The metrological triangle'']

* [http://www.bipm.org/cc/CIPM/Allowed/94/CIPM-Recom1CI-2005-EN.pdf Recommendation of ICWM 1 (CI-2005)]

* [http://www.ukma.org.uk/ The UK Metric Association]

* [http://www.metric.org/ The US Metric Association]

 

;Pro-customary measures pressure groups

{{تصنيف كومنز|International System of Units}}

{{سوابق وحدات الطول في النظام الدولي للوحدات