Politics & EconomicsProgress report : experiments on strength of small pillars of coal in the Pittsburgh bedH. P. Greenwald![Progress report : experiments on strength of small pillars of coal in the Pittsburgh bed]()
Progress report : experiments on strength of small pillars of coal in the Pittsburgh bed
H. P. Greenwald
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“Progress report : experiments on strength of small pillars of coal in the Pittsburgh bed” by H. P. Greenwald: a public-domain book in “Politics &…
Catalogue details
- Author
- H. P. Greenwald
- Category
- Politics & Economics
- Language
- English
- Source
- HathiTrust