TY  - BOOK
AU  - Schumann,Walter
TI  - Gemstones of the world
SN  - 0806930896
AV  - QE392 .S54513
U1  - 553/.8 
PY  - 1977///
CY  - New York
PB  - Sterling Pub. Co.
KW  - Precious stones
N1  - Translation of Edelsteine und Schmucksteine; Includes index; Bibliography: p. 250
ER  -