Anderson, B. W.
Gem testing / B. W. Anderson. - 7th ed. - London : Temple Press Books, c 1964. - 382 p. : ill ; 22 cm.
324 324
Gems.
553.8 / A23g
Gem testing / B. W. Anderson. - 7th ed. - London : Temple Press Books, c 1964. - 382 p. : ill ; 22 cm.
324 324
Gems.
553.8 / A23g