Author: Ashburner, Chas. A.
Title: New Method for Estimating the Contents of Highly Plicated Coal Beds as Applied to the Anthracite Fields of Pennsylvania. With a Mathematical Consideration of the Errors Involved by Arthur Winslow.
Description: Philadelphia, Author's Edition, 1883,. 230x155mm, 16 pages, paperback.

Keywords: geologie usa pennsylvania