@book{94345,
	author = {Castañeda Díaz, Saúl.},
	title = {Sucesión ecológica en San Miguel Pipillola, Españita, Tlaxcala},
	publisher = {El autor,},
	year = {2007},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/105937.pdf}
}