Franklin

MLA

Allen, Arthur Thomas, and James George Lester. ... Zonation of the Middle and Upper Ordovician Strata In Northwestern Georgia. Altanta, 1957.

APA

Allen, A. Thomas, & Lester, J. George. (1957). ... Zonation of the Middle and Upper Ordovician strata in northwestern Georgia. Altanta.

Chicago

Allen, Arthur Thomas., and James George Lester. ... Zonation of the Middle and Upper Ordovician Strata In Northwestern Georgia. Altanta, 1957.