Webster, Robert.
Gems: Their Sources, Descriptions and identification / - 3rd ed. / - London WC2B 6AB : Butterworth & Co (Publishers) , 1984 - xviii,938p ;
0 408 70573 6
Ruby
H19 / L5W
Gems: Their Sources, Descriptions and identification / - 3rd ed. / - London WC2B 6AB : Butterworth & Co (Publishers) , 1984 - xviii,938p ;
0 408 70573 6
Ruby
H19 / L5W