APA

Wolfson D. E., Ortuglio C., . (1968). Carbonizing properties of coals from Fayette, Greene and Washington Counties, Pa. [Washington, DC]: Bureau of Mines, US Dep. of the Interior.

Chicago

Wolfson David E, Ortuglio Carmen, . 1968. Carbonizing properties of coals from Fayette, Greene and Washington Counties, Pa. [Washington, DC]: Bureau of Mines, US Dep. of the Interior.

Harvard

Wolfson D. E., Ortuglio C., . (1968). Carbonizing properties of coals from Fayette, Greene and Washington Counties, Pa. [Washington, DC]: Bureau of Mines, US Dep. of the Interior.

MLA

Wolfson David E, Ortuglio Carmen, . Carbonizing properties of coals from Fayette, Greene and Washington Counties, Pa. [Washington, DC]: Bureau of Mines, US Dep. of the Interior. 1968.