Liebenberg, Elri.

History of military cartography = 5th International Symposium of the ICA Commission on the History of Cartography, 2014 / by: Liebenberg, Elri.; Demhardt, Imre Josef.; ICA Commission on the History of Cartography in the 19th and 20th centuries. (2014 :); SpringerLink (Online service); Vervust, Soetkin. (Language materials, printed)

History of cartography = International Symposium of the ICA Commission, 2010 / by: Demhardt, Imre Josef.; Liebenberg, Elri.; Workshop on the Preservation of Stability under Discretization ((2001 :); SpringerLink (Online service) (Language materials, printed)

History of Military Cartography = 5th International Symposium of the ICA Commission on the History of Cartography, 2014 / by: Liebenberg, Elri.; Demhardt, Imre Josef.; Vervust, Soetkin.; SpringerLink (Online service) (Language materials, printed) , [http://id.loc.gov/vocabulary/relators/edt]

History of cartography = International Symposium of the ICA, 2012 / by: Liebenberg, Elri.; Workshop on the Preservation of Stability under Discretization ((2001 :); Collier, Peter.; Torok, Zsolt Gyozo.; SpringerLink (Online service) (Language materials, printed)