1. Gildemeister, E., andHoffmann, F.,“Die Ätherischen Öle,”3rd Edition.
2. Tyrolean Oils;Guenther;Am. Perfumer,1936
3. Bericht von Schimmel & Co.,(1937),page 22.
4. Shipments of commercial samples of Tyrolean Oil Pinus Pumilio received by Fritzsche Brothers, Inc., N. Y.
5. Loc. cit., Vol. II,page 182.