1. Outdoor Recreation Review Commission, Outdoor Recreation for America: A Report to the President and to the Congress, Washington: US Government Printing Office, 1962.
2. Geography and Geographers: Anglo-American Human Geography Since 1945, 6th Edition, R.J. Johnston and J.D. Sidaway, Eds., London: Arnold, 2004.
3. Geography of Tourism: Manual, A.Yu. Aleksandrova, Ed., 3rd Edition, Moscow: KnoRus, 2013 [in Russian].
4. Jensen, C.R., Outdoor Recreation in America: Trends, Problems, and Opportunities, Minneapolis: Burgess Pub. Co., 1970.
5. The Theoretical Foundations of Recreation Geography, V.S. Preobrazhenskii, Ed., Moscow: Nauka, 1975 [in Russian].