@book{21871,
	author = {Martorell, Alberto, },
	title = {Machu Picchu : patrimonio cultural en peligro},
	publisher = {Editorial Malze,},
	year = {2000},
	address = {Lima :},
	url = {https://research-ebsco-com.ucsp.lookproxy.com/c/qxo6us/search}
}