PURVIS M. AND GRAINGER A, . (2005). "EXPLORING SUSTAINABLE DEVELOPMENT, GEOGRAPHICAL PERSPECTIVES.". LONDON: EARTHSCAN.
PURVIS M. AND GRAINGER A, . 2005. "EXPLORING SUSTAINABLE DEVELOPMENT, GEOGRAPHICAL PERSPECTIVES.". LONDON: EARTHSCAN.
PURVIS M. AND GRAINGER A, . "EXPLORING SUSTAINABLE DEVELOPMENT, GEOGRAPHICAL PERSPECTIVES.". LONDON: EARTHSCAN. 2005.