Description
Item Description:Reprint. Originally published: Washington, D.C. : International Union of Geological Sciences, Subcommission on Devonian Stratigraphy, 1981.
"August, 1986."
"July 1981"--Cover.
Physical Description:2 volumes in 1 (iv, 105, 69 pages) : illustrations, maps ; 28 cm.
Bibliography:Includes bibliographies.