Beginner's Guide to GemmologyLibro electrónicoBeginner's Guide to GemmologydePeter G ReadCalificación: 4 de 5 estrellas4/5Guardar Beginner's Guide to Gemmology para después
Gemmological Instruments: Their Use and Principles of OperationLibro electrónicoGemmological Instruments: Their Use and Principles of OperationdePeter G ReadCalificación: 5 de 5 estrellas5/5Guardar Gemmological Instruments: Their Use and Principles of Operation para después