Consideraţii privind un posibil atelier neo-eneolitic de prelucrat piese mici de obsidian de la Tăşad (jud. Bihor). Apreciations concerning a possible neo-eneolithical workshop for processing obsidian from Tăşad (Bihor county) - Pop, Speranţa (Satu Mare, 13 (1996), 1996)