APA

Ryder R. T., Zagorski W. A. & Zagorski W. A.Nature, origin, and production characteristics of the lower silurian regional oil and gas accumulation, central appalachian basin, United States. : .

Chicago

Ryder Robert T, Zagorski William A and Zagorski William A.Nature, origin, and production characteristics of the lower silurian regional oil and gas accumulation, central appalachian basin, United States. : .

Harvard

Ryder R. T., Zagorski W. A. and Zagorski W. A.Nature, origin, and production characteristics of the lower silurian regional oil and gas accumulation, central appalachian basin, United States. : .

MLA

Ryder Robert T, Zagorski William A and Zagorski William A.: . .