00981nam--2200373---450-99000273838020331620060420130532.00408011904000273838USA01000273838(ALEPH)000273838USA0100027383820060420d1983----km-y0itay0103----baengGB||||||||001yyGemmological instrumentstheir use and principles of operationPeter G. Read2. ed.LondonButterworthsc1983328 p.ill.23 cm20012001001-------2001Gemmologia553.8READ,Peter G.593140ITsalbcISBD990002738380203316P13 509DISTRABKDISTRADISTRA21020060420USA011305Gemmological instruments998835UNISA