books.google.com - Quantities, Units and Symbols in Physical Chemistry Third Edition The first IUPAC Manual of Symbols and Terminology for Physicochemical Quantities and Units (the "Green Book") of which this is a successor, was published in 1969, with the objective of 'securing clarity and precision, and wider agreement...https://books.google.com/books/about/Quantities_Units_and_Symbols_in_Physical.html?id=TElmhULQoeIC&utm_source=gb-gplus-shareQuantities, Units and Symbols in Physical Chemistry
