APA

United States, . (197). The relation of coal characteristics to liquefaction behavior. [Washington, D.C: .

Chicago

United States, . 197. The relation of coal characteristics to liquefaction behavior. [Washington, D.C: .

Harvard

United States, . (197). The relation of coal characteristics to liquefaction behavior. [Washington, D.C: .

MLA

United States, . The relation of coal characteristics to liquefaction behavior. [Washington, D.C: . 197.