Coal-mine timbering
Subtitle: technical information for use in vocational classes
Contributors: United States. Federal Board for Vocational Education; United States. Bureau of Mines
Edition: Rev. ed.
Series: United States. Federal Board for Vocational Education. Bulletin -- no. 40; Trade and industrial series -- no. 10; Bulletin -- no. 40.; Trade and industrial series -- no. 10.
Publisher: Issu d by Federal Board for Vocational Education; For sale by Supt. of Docs.
Published: 1931
Place of publication: Washington, D.C
Language: eng
Number of pages: 100
Subjects: Mine timbering; Mining engineering
Notes: Cover title.

"The first edition ... published ... in 1919 ... was prepared by R.Z. Virgin, ... reviewed and criticized by ... the United States Bureau of Mines."--P. ix.