|WikiProject Glass||(Rated Stub-class, High-importance)|
The reference #6 doesn't appear to mention the specific number of 20 molar percent in the statement for which it is used. Where does this come from? --SoledadKabocha (talk) 20:21, 2 December 2013 (UTC)
I noticed a number of references using the url to a Google Book link. I though editors might be interested in a tool which takes a link as input and creates a (usually) properly formatted ref.
I used it to improve two such references.