%0 U.S. Federal Government Document %0 Print %0 Book %A Krieger, Medora Louise Hooper, 1905- %I U.S. Govt. Print. Off. : for sale by the Supt. of Docs. %D 1979 %C Washington %G English %B Geological Survey professional paper. %T Ash-flow tuffs of the Galiuro Volcanics in the northern Galiuro Mountains, Pinal County, Arizona