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Economic benefits of systematic roof bolting in Zeigler no. 3 Mine, Bell & Zoller coal & mining co., Williamson County, Ill.

Kelly, L. W.

Category

Nature

Title

Economic benefits of systematic roof bolting in Zeigler no. 3 Mine, Bell & Zoller coal & mining co., Williamson County, Ill.

Description

Economic benefits of systematic roof bolting in Zeigler no. 3 Mine, Bell & Zoller coal & mining co., Williamson County, Ill. / by L. W. Kelly

Physical description

9 p., 9 c. di tav. : ill. ; 27 cm.

Date

1952

Place of publication

[Washington]

Village

STATI UNITI

Tongue

ID

IT\ICCU\CAG\1865551
Biblioteca del Distretto Tecnologico – sezione Ingegneria

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