The American Society of Mechanical Engineers, ASME, is the developer of American National Standards in dimensional metrology. The designated committee is called “B89”. The standards are copyrighted and cannot be distributed here. Below is a link to the ASME website...

This is a link to the website of the BIPM to download the GUM – the JCGM 100:2008 Evaluation of measurement data – Guide to the expression of uncertainty in measurement (GUM 1995 with minor corrections).

This is a link to the website of the BIPM to download the VIM – the JCGM 200:2012, International vocabulary of metrology – Basic and general concepts and associated terms, 3rd edition