@book{40627,
	author = {Chomnales, R.},
	title = {Estudio microscópico de un preconcentrado de escombreras de Mina Concordia, prov. de Salta.},
	publisher = {IDGYM,},
	year = {jul, 1979.},
	series = {Informe Inédito},
	address = {Jujuy :}
}