Dr. Cass Ingram's complete reference for wild-harvested spruce resin — uses, application, and Canadian wilderness sourcing tradition.
The traditional resin of the boreal forest.
Dr. Cass Ingram's complete reference for wild-harvested spruce resin — uses, application, and the Canadian wilderness sourcing tradition. Free PDF.
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Download Your GuideWild-harvested · Family-owned · Founded by Dr. Cass Ingram · Third-party tested
