Practical Gold-Mining: a comprehensive treatise on ... gold-bearing gravels, rocks and ores, and the methods by which the gold is extracted ... With ... plates, etc. [With a bibliography (1889)
LOCK, Charles George Warnford. · E. & F. N. Spon · leaf 219
British Library · HMNTS 7104.de.20. · Digitised by the British Library with Microsoft · No known copyright restrictions (public domain). Free to use for anything.
