Assessing Early Spanish Explorer Routes Through Authentication of Rock Inscriptions Dorn, Ronald I. ; Moore, Gordon ; Pagán, Eduardo O. ; Bostwick, Todd W. ; King, Max ; Ostapuk, Paul Abstract Publication: The Professional Geographer Pub Date: August 2012 DOI: 10.1080/00330124.2011.603659 Bibcode: 2012ProfG..64..415D