Ueber Das Harz Von Dammara Orientalis (Manila-Copal), Und, Ueber Das Siebenbürgische Resina Pini Von Picea Vulgaris (Link) : Inaugural-Dissertation (Classic Reprint) - Walmart.com
Song Xiang, Resina Pini, Pine Resin, Colophonium|Artificial & Dried Flowers| - AliExpress