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Godehard Lenzen
Book order (chronological)
Godehard Lenzen
Book order (chronological)
Author's work
Book order (chronological)
Edelsteinbestimmung mit gemmologischen Geräten
318
pages
12
hours of reading
1984
5.0
Track
Diamantenkunde
336
pages
12
hours of reading
1979
4.0
Track
Die Qualitätsmerkmale des Diamanten. Teil I. Die Farbe
1966
