A Rudimentary Treatise on Geology for the Use of Beginners by Majorgeneral Portlock
A Rudimentary Treatise on Geology for the Use of Beginners by Majorgeneral Portlock by J. E. Portlock (1859). Full text and reference in the Mountain Man…
Public-domain full text preserved in the Mountain Man Mining Library. Original source: archive.org.
A Rudimentary Treatise on Geology for the Use of Beginners by Majorgeneral Portlock Author: J. E. Portlock Year: 1859 Category: Historical Tags: archive.org, mica deposits Source: ://archive.org/details/bub_gb_A4sbkuMJT1QC