Geology, mining, and methane content of the Freeport and Kittanning coalbeds in Indiana and surrounding counties, Pa. /
by D.G. Puglio and A.T. Iannacchione.

APA Citation

Puglio, D. G. (Donald G.)., Iannacchione, A. (1979). Geology, mining, and methane content of the Freeport and Kittanning coalbeds in Indiana and surrounding counties, Pa.. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines.

MLA Citation

Puglio, D. G. (Donald G.), and Anthony Iannacchione. Geology, Mining, And Methane Content of the Freeport And Kittanning Coalbeds In Indiana And Surrounding Counties, Pa.. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines, 1979.