NADAL, Francesc y URTEAGA, Luis (2015): Instituto Geográfico Nacional (National Geographical Institute. Spain), dins Mark Monmonier, ed.: The History of Cartography. Volume Six: Cartography in the Twentieth Century, Chicago, The University of Chicago Press, pp. 650-654.
NADAL, Francesc y URTEAGA, Luis (2015): Instituto Geográfico Nacional (National Geographical Institute. Spain), dins Mark Monmonier, ed.: The History of Cartography. Volume Six: Cartography in the Twentieth Century, Chicago, The University of Chicago Press, pp. 650-654.
NADAL, Francesc y URTEAGA, Luis (2015): Instituto Geográfico Nacional (National Geographical Institute. Spain), dins Mark Monmonier, ed.: The History of Cartography. Volume Six: Cartography in the Twentieth Century, Chicago, The University of Chicago Press, pp. 650-654.