TY  - GEN
AU  - Mumme, I.A.
TI  - The world of sapphires : their occurrence, discrimination, synthesis, and valuation  
SN  - 0-9593069-1-9
PY  - 1988///
CY  - New South Wales
PB  - Mumme Publications
KW  - PRECIOUS STONES
N1  - A photocopy
ER  -