Marsh, George P. 1801-1882
The Earth as Modified by Human Action [recurso electrónico] / George P. Marsh - Project Gutenberg, 2004 - Project Gutenberg 6019 .
Public domain in the USA.
Text
Physical geography Conservation of natural resources Human geography Nature -- Effect of human beings on
GF
The Earth as Modified by Human Action [recurso electrónico] / George P. Marsh - Project Gutenberg, 2004 - Project Gutenberg 6019 .
Public domain in the USA.
Text
Physical geography Conservation of natural resources Human geography Nature -- Effect of human beings on
GF