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URL: http://cool.conservation-us.org/don/fn/fn20.html
Timestamp: Thursday, 10-Mar-2011 17:22:26 PST
Retrieved: Monday, 20-May-2013 04:43:07 GMT
" Apps, E. A. Ink technology for printers and students. New York. Chemical Publishing Co. 1963. 3 vol.
URL: http://cool.conservation-us.org/don/fn/fn20.html
Timestamp: Thursday, 10-Mar-2011 17:22:26 PST
Retrieved: Monday, 20-May-2013 04:43:07 GMT