Information circulars. I 28.27:(nos.). 8086. Sinking methods and coats for small vertical shaft with steel supports, Keystone mine, Crested Butte, Colo.; by R. L. Bolmer.
Publication Title:
Sinking methods and coats for small vertical shaft with steel supports, Keystone mine, Crested Butte, Colo.; by R. L. Bolmer.
Display Title:
Information circulars. I 28.27:(nos.). 8086. Sinking methods and coats for small vertical shaft with steel supports, Keystone mine, Crested Butte, Colo.; by R. L. Bolmer.
Series Title:
Information circulars. I 28.27:(nos.)
Corporate Agency Authors:
Mines Bureau and Interior Dept.
Sort Author:
Mines Bureau
Authors:
Bolmer, R. L.
Date:
[1962.]
Publish Date ISO Format:
1962-01-01T00:00:00Z
Publication Start:
19620101
Publication End:
19621231
Corporate/Agency Author:
Mines Bureau
Publication month:
13
Publication year:
1962
Description:
[2]+ ii+25 p. il. 4°
Notes:
† Distribution Made by Issuing Office. Mines Bureau, Pittsburgh, Pa. • Sent to Depository Libraries. Item 637-A
Availability:
† Distribution Made by Issuing Office. Mines Bureau, Pittsburgh, Pa. • Sent to Depository Libraries. Item 637-A