Bibliography
"Riverside Dreamer River Tours." Riverside Club On The River. Accessed February 10, 2013. http://www.ontheriver.net/rivertours.html.
"Unique Facts about Mexico: Rio Grande." Unique Facts about Mexico: Rio Grande. Accessed February 15, 2013. http://www.sheppardsoftware.com/Mexicoweb/factfile/Unique-facts-Mexico2.htm.
"The UTPA Center for Subtropical Studies." The UTPA Center for Subtropical Studies. January 11, 2013. Accessed February 10, 2013. http://www.utpa.edu/centers/css/.
"Welcome To Your Truly Green Experience in Puerto Rico!" Welcome To Your Truly Green Experience in Puerto Rico! Accessed February 10, 2013. http://www.eietecotourspr.com/EIET_Web-Site_08/Welcome.html.
"Riverside Dreamer River Tours." Riverside Club On The River. Accessed February 10, 2013. http://www.ontheriver.net/rivertours.html.
"Unique Facts about Mexico: Rio Grande." Unique Facts about Mexico: Rio Grande. Accessed February 15, 2013. http://www.sheppardsoftware.com/Mexicoweb/factfile/Unique-facts-Mexico2.htm.
"The UTPA Center for Subtropical Studies." The UTPA Center for Subtropical Studies. January 11, 2013. Accessed February 10, 2013. http://www.utpa.edu/centers/css/.
"Welcome To Your Truly Green Experience in Puerto Rico!" Welcome To Your Truly Green Experience in Puerto Rico! Accessed February 10, 2013. http://www.eietecotourspr.com/EIET_Web-Site_08/Welcome.html.