http://tobaccodocuments.org/product_design/2060538995-9028.html
Aulbach, Paul L.; Black, Roger R.; Chakraborty, Baran B.; Diesing, Art C.; Gonterman, Rick A.; Johnson, R. R.; Scholten, Dave L. "Root Technology: A Handbook for Leaf Blenders and Products Developers". Feb 1991. Bates: 2060538995.
http://tobaccodocuments.org/product_design/2060538995-9028.html