sensory value between luwak coffee and original coffee from Arabica (Coffea arabica L) and Robusta (Coffea canephora L) varieties (页面存档备份,存于互联网档案馆) (PDF)
维基共享资源上的相关多媒体资源:哈希什 Bibliography of scholarly histories on cannabis and hashish(页面存档备份,存于互联网档案馆) Hashish Making and Varieties Altered States Database(页面存档备份,存于互联网档案馆)