Stone-splitters of Ashfork
Author
R. Henderson
Article Date
September 1949
Journal Title
Des
SANDSTONE
Nature's A B C's on the Yuma Mesa
Author
J. C. Coyle
Article Date
September 1942
Article Abstract
Man collects sandstone concretions in the shapes of letters
Journal Title
Des
Arizona flagstone
Author
J. C. Robertson
Article Date
May 1954
Journal Title
Ariz Hwys