For how to read and download these ebooks, please visit the ebook guide.
IUPAC Compendium of Chemical Terminology - the Gold Book
NIST Chemistry WebBook
Kaye & Laby Tables of Physical & Chemical Constants
Please note that this is a historical version of the document. For example, it does not contain the new SI Base Unit definitions from May 2019, or the fundamental constant values also redefined around that time
NIST Physical Reference Data
Clinical Chemistry Guide for Scientific Writing