TY - JOUR T1 - On a Collection of Rock Specimens from the Island of Socotra JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 174 SP - 273 EP - 294 PY - 1883/01/01/ UR - http://dx.doi.org/10.1098/rstl.1883.0006 M3 - doi:10.1098/rstl.1883.0006 AU - Bonney, T. ER -