Petrified forest :
Ash, Sidney R.
Petrified forest : the story behind the scenery / by Sidney R. Ash and David D. May. - Holbrook, Ariz. : Petrified Forest Museum Association, 1969. - 32 p. : ill.
Petrified forests.
Geography--Travel and travel guides.
Petrified forest : the story behind the scenery / by Sidney R. Ash and David D. May. - Holbrook, Ariz. : Petrified Forest Museum Association, 1969. - 32 p. : ill.
Petrified forests.
Geography--Travel and travel guides.