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(Rep)
Use the Material_Technique field record what materials were used in making the work. In our Luna database we treat this field as a free text field where a list of materials and their relationship to each other are represented in a single phrase. Take this information from the image source or other reputable sources that you come across while catloging the work. Do not use the 'Material_Technique refid source' or 'Material_Technique refid' fields.
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Work_type: lithograph
Work_type refid source: Getty AAT
Work_type refid: 300041379
Work_type: chair
Work_type refid source: Getty AAT
Work_type refid: 300037772
Work_type: coins (money)
Work_type refid source: Getty AAT
Work_type refid: 300037222