Report of investigations. 6980. Relative pressure changes in coal pillars during extraction, progress report [with list of references]; by Ernest A. Curth.
Publication Title:
Relative pressure changes in coal pillars during extraction, progress report [with list of references]; by Ernest A. Curth.
Display Title:
Report of investigations. 6980. Relative pressure changes in coal pillars during extraction, progress report [with list of references]; by Ernest A. Curth.
Series Title:
Report of investigations.
Corporate Agency Authors:
Mines Bureau and Interior Dept.
Sort Author:
Mines Bureau
Authors:
Curth, Ernest A.
Author place:
Washington, D.C
Author zip:
20240
Date:
[July 1967.]
Publish Date ISO Format:
1967-07-01T00:00:00Z
Publication Start:
19670701
Publication End:
19670731
Corporate/Agency Author:
Mines Bureau
Publication month:
6
Publication year:
1967
SuDoc number:
I 28.23:(nos.)
Description:
[3] +20 p. il. 4°
Notes:
† Distribution Made by Issuing Office. Mines Bureau, Pittsburgh, Pa. 15213 • Sent to Depository Libraries. Item 637-A
Availability:
† Distribution Made by Issuing Office. Mines Bureau, Pittsburgh, Pa. 15213 • Sent to Depository Libraries. Item 637-A