„Glerblástur“: Munur á milli breytinga
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Myndbönd á youtube.com
* [http://www.youtube.com/watch?v=-Hid5QTbbCo Why Venice became the centre of glass manufacture (vídeó 4. mín)]
* [http://www.youtube.com/watch?v=EqcP-KxJdS0 The history of glass making in Venice (vídeó 3 mín)]
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