Anderson, B.W.
Gem testing - 9th ed. - London Butterworths 1980 - 434p. : ill., photos. (some col.)
0408004401
GEMS
PRECIOUS STONES
549.091 / A6
Gem testing - 9th ed. - London Butterworths 1980 - 434p. : ill., photos. (some col.)
0408004401
GEMS
PRECIOUS STONES
549.091 / A6