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View Ueber das Harz von Dammara orientalis (Manila-Copal), und, Ueber das siebenbürgische Resina Pini von Picea vulgaris (Link) By M. Koch 
Ueber das Harz von Dammara orientalis (Manila-Copal), und, Ueber das siebenbürgische Resina Pini von Picea vulgaris (Link)
By M. Koch