00960nam--2200361---450-99000273575020331620060413123231.00408005475000273575USA01000273575(ALEPH)000273575USA0100027357520060413d1983----km-y0itay0103----baengGBa|||||||001yyDiamonds and diamond gradingG. Lenzentranslated by Patricia B. LapworthLondonButterworthsc1983258 p.ill.24 cm20012001001-------2001Diamanti553.82LENZEN,Godehard593089ITsalbcISBD990002735750203316P13 436DISTRABKDISTRADISTRA21020060413USA011232Diamonds and diamond grading998647UNISA