TY  - JOUR
T1  - Some Observations on the Country and Mines of Spain and Germany, with an Account of the Formation of the Emery Stone; From William Bowles, Esq; Director General of the Mines of Spain; Communicated by P. Collinson, F. R. S.
JF  - Philosophical Transactions (1683-1775)
VL  - 56
SP  - 229
EP  - 236
PY  - 1766/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1766.0027
M3  - doi:10.1098/rstl.1766.0027
AU  - Bowles, W.
AU  - Collinson, P.
ER  -