Rare and uncommon chemical elements in coal
By: F.H. Gibson and W.A. Selvig.
Contributors: Selvig, W. A. 1886-
Series: Technical paper - United States. Bureau of Mines ;; 669; Technical paper (United States. Bureau of Mines) ;; 669.
Publisher: U.S. Govt. Print. Off.
Published: 1944
Place of publication: Washington
Language: eng
Number of pages: 23
Subjects: Coal -- Analysis.
Notes: "Literature cited": p. 19-23.
Cover title.
At head of title: United States Department of the Interior, Harold L. Ickes, Secretary; Bureau of Mines, R.R.Sayers, Director.