Mine-Ventilation Stoppings: with Especial Reference to Coal Mines in Illinois
Description:
Purpose of Report: "In this report an attempt is made to discuss the first cost of each of several types of mine-ventilation stoppings, as well as the total annual expenses of maintaining a stopping during its required period of service."
Date:
1915
Creator:
Williams, R. Y.
Item Type:
Refine your search to only
Report
Partner:
UNT Libraries Government Documents Department