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Oman Adorned by Pauline Shelton Robert Richmond / Apex London 1997 p 66 bottom
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Oman catalogue Tentoonstelling Nieuwe Kerk 2009 page 132
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Disappearing treasures of Oman 1998 by Avelyn Foster p 66 fig 57
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Silver the traditional Art of Oman 2000 (new edition) Ruth Hawley p 34
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Silver jewellery of Oman by Jehan S Rajab 1997 p 24
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Traditional silver jewelry and handicrafts from Oman 2009 by Jean Greffioz page 18-19
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Arab & Islamic Silver by Saad Al-Jadir 1981 Stacey International page 94
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British Museum on-line collection number 2009,6023.158 Weight 144 grams Comment: This is a relatively modern example
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Islamic Art in Oman page 342 poor examples
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Oman Faces and Places p 118 (modern example of this type)
Oman and its Renaissance by Sir Donald Hawley Stacey International London 1987 page 94 photo left shows a girl wearing a very similar Halka.
Oman Faces and places, articles from PDO News magazine 2009. Contains photo of a modern Halka being made p141