"किलोग्रॅम" च्या विविध आवृत्यांमधील फरक

* एन.पी.एल. (युनायटेड किंग्डम): ''[http://www.npl.co.uk/server.php?show=ConWebDoc.1380 What are the differences between mass, weight, force and load?]''

* [[बीबीसी|बी.बी.सी.]]: ''[http://news.bbc.co.uk/1/hi/sci/tech/7084099.stm Getting the measure of a kilogram]''

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