Information circulars. 7768. Sampling deep ore deposits by rotary drilling and methods of surveying and controlling direction of drill holes:by Russell R. Trengove and A. C. Johnson.
Publication Title:
Sampling deep ore deposits by rotary drilling and methods of surveying and controlling direction of drill holes:by Russell R. Trengove and A. C. Johnson.
Display Title:
Information circulars. 7768. Sampling deep ore deposits by rotary drilling and methods of surveying and controlling direction of drill holes:by Russell R. Trengove and A. C. Johnson.
Series Title:
Information circulars.
Corporate Agency Authors:
Mines Bureau and Interior Dept.
Sort Author:
Mines Bureau
Authors:
Trengove, Russell R. and Johnson, A. C.
Date:
Dec. 1956
Publish Date ISO Format:
1956-12-01T00:00:00Z
Publication Start:
19561201
Publication End:
19561231
Corporate/Agency Author:
Mines Bureau
Publication month:
1
Publication year:
1956
SuDoc number:
I 28.27:(nos.)
Description:
[1]+15 p. il. 4°
Notes:
[Processed.]
Notes:
[Processed.] † Distribution Made by Issuing Office. Mines Bureau, Pittsburgh, Pa.
Availability:
† Distribution Made by Issuing Office. Mines Bureau, Pittsburgh, Pa.