TY  - JOUR
T1  - Limestone as an Index of Geological Time. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 28
SP  - 281
EP  - 283
PY  - 1878/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1878.0128
M3  - doi:10.1098/rspl.1878.0128
AU  - Reade, T.
ER  -