TY - JOUR T1 - On the Structure of Some Limestone Nodules Enclosed in Seams of Bituminous Coal, with a Description of Some Trigonocarpons Contained in Them JF - Proceedings of the Royal Society of London (1854-1905) VL - 7 SP - 188 EP - 189 PY - 1854/01/01/ UR - http://dx.doi.org/10.1098/rspl.1854.0049 M3 - doi:10.1098/rspl.1854.0049 AU - Hooker, J. ER -