The purchase of coal under government and commercial specifications on the basis of its heating value, with analyses of coal delivered under government contracts /
Dwight T. Randall.
- Washington : Govt. Print. Off., 1908.
- 27, i p.; 24 cm.
- U.S. Geological Survey. Bulletin no. 339 .
- Geological Survey (U.S.). Bulletin ; no. 339. .
Subject series: Q, Fuels, 10. Issued also as House doc. no. 734, 60th Cong., 1st sess.