1.
Photoatlas of Inclusions in Gemstones
by Gubelin, E. J., Koivula, J. I.
ISBN: 9783855040957
List Price: $234.95
2.
Photoatlas of Inclusions in Gemstones (Photoatlas of Inclusions in Gemstones, Volume 2)
by E. J. Gubelin, J. I. Koivula
ISBN: 9783039990290