Gemmological insruments : their use and principles of operation /
Read, Peter G.
Gemmological insruments : their use and principles of operation / P. G. Read. - 2nd ed. - London : Butterworths, 1983. - 327 p. : ill. ; 23 cm.
Precious stones -- Instruments.
Precious stones -- Tests.
553.8 REA
Gemmological insruments : their use and principles of operation / P. G. Read. - 2nd ed. - London : Butterworths, 1983. - 327 p. : ill. ; 23 cm.
Precious stones -- Instruments.
Precious stones -- Tests.
553.8 REA