Keywords: Juan Gutierrez de Gualda.png en Front page of Arithmetic 1564 by Juan Gutiérrez de Gualda 16th century 1564 Google books https //books google cat/books id CyBRAAAAcAAJ Juan Gutiérrez de Gualda other versions Custom license marker 2015 10 19 pd-old-100 Mathematicians from Spain 1564 book covers Mathematics book covers Uploaded with UploadWizard |