TY  - BOOK
AU  - Traill,George William
TI  - An elementary treatise on quartz and opal, including their varieties: with a notice of the principal foreign and British localities in which they occur 
AV  - QE 391.Q2 T73.1867
PY  - 1867///
CY  - Edinburgh
PB  - MacLachlan & Stewart
KW  - Quartz
KW  - Cuarzos
KW  - Opalos
KW  - Arithmetic
KW  - Aritmética
N1  - Incluye índice; Cover title: Treatise on quartz and opal; Sello con la leyenda: "Carlos F. de Landero, Guadalajara"; Sello con la leyenda: "C.F.L."
ER  -