by [U.S. Dept. of the Interior, Office of Coal Research]; for sale by the Supt. of Docs. U.S. Govt. Print. Off. in Washington .
Written in English
|Statement||Prepared by Charles H. Wright, Russell E. Perrussel [and] Gerard R. Pastor of the Pittsburgh & Midway Coal Mining Co., Kansas City, Missouri for Office of Coal Research, Dept. of the Interior|
|Series||United States. Dept. of the Interior. Office of Coal Research. R & D report -- no. 53. Interim report no. 6|
|Contributions||Perrussel, Russell E, Pastor, Gerald R, United States. Office of Coal Research|
|The Physical Object|