Sequoia and Kings Canyon : natural sciences research plan Author(s) Sumner, Lowell Sprugel, George Linn, Robert M.
Colombia's national parks : an analysis of management problems and perceived values Author(s) Meganck, Richard Albert
Evaluación y bases para el manejo del parque nacional de Tingo Maria (Huánuco, Perú) Author(s) Dourojeanni, Marc J. Tovar S., Augusto