by Walter Schumann
Hardcover
ISBN: 978-1-4027-4016-9
ISBN-10: 1-4027-4016-6
Sterling Publishing · 2007
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by Walter SchumannHardcover
ISBN: 978-1-4027-4016-9 ISBN-10: 1-4027-4016-6 Sterling Publishing · 2007 |
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| 2009 | Hardcover | Gemstones of the World: Newly Revised & Expanded Fourth Edition |