Resins in coal
By: by W.A. Selvig.
Series: Technical paper - United States. Bureau of Mines ;; 680; Technical paper (United States. Bureau of Mines) ;; 680.
Publisher: U.S. Govt. Print. Off.
Published: 1945
Place of publication: Washington, D.C
Language: eng
Number of pages: 24
Subjects: Gums and resins.; Coal -- Analysis.
Notes: Includes bibliographical references.
Cover title.
At head of title: United States Department of the Interior, Harold L. Ickes, Secretary; Bureau of Mines, R.R. Sayers, Director.