Conzen, M., 1993, 'The historical impulse in Geographical writing about the United States 1850 1990', in Conzen, M., Rumney, T. and Wynn, G., A Scholar's Guide to Geographical Writing on the American and Canadian Past, The University of Chicago Press, Chicago, pp. 3 90.
Denevan William M., 1992, 'The Americas before and after 1492: Current Geographical Research', Annals of the Association of American Geographers, Vol. 82, No. 3, pp. 369–385.
Elkins, T. H., 1989, 'Human and Regional Geography in the German-speaking lands in the first forty years of the Twentieth Century', in J. Nicholas Entrikin & Stanley D. Brunn (eds). Reflections on Richard Hartshorne's The nature of geography, Occasional publications of the Association of the American Geographers, Washington DC. 17-34.
James, P. E. and Martin, G., 1981, All Possible Worlds: A history of geographical ideas, John Wiley & Sons, New York
Jones, M., 2003, 'The Concept of Cultural Landscape: Discourse and Narratives', in H. Palang & G. Fry (eds.), Landscape Interfaces. Cultural Heritage in Changing Landscapes, Dordrecht, 21-51
Sauer, C., 1925, The Morphology of Landscape, University of California Publications in Geography, 22:19-53.
