@book{92014,
	author = {Gregorio Martínez, Albino.},
	title = {Uso y aprovechamiento del copal [Bursera bipinnata (Moc, & Sessé ex DC.) Engl.] en el municipio de San Juan Quiotepec, Ixtlán, Oaxaca /},
	publisher = {El autor,},
	year = {2005.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/103553.pdf}
}