NNew directions in goldsmithingNew directions in goldsmithingde Harold O'ConnorMateriasGoldworkJewelry makingEdiciones (1)New directions in goldsmithing (1975)Dunconor Books · inglésMás obras de Harold O'ConnorCCreative jewelry techniquesCreative jewelry techniquesFlexible Shaft Machine Jewelry TechniquesPProcedures and formulas for metal craftsmenProcedures and formulas for metal craftsmen