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2. The chemistry of western red cedar bark;Fraser;For. Tech. Publ. (Can. For. Serv.),1978
3. Characteristic of phlobaphene from western red cedar bark;Swan;Forest Prods J.,1963
4. The chemistry of natural phlobaphene I. Pyrolysis of the phlobaphene from redwood;Zavarin;Tappi,1963
5. Chemistry of Boswellia serrata Bark;Beri;Indian Forest Leaflet,1964