@booklet {4347,
	title = {LOWELL, G.R. and VILLAS, R.N. 1983. Petrology of nepheline syenite gneiss from Amazonian Brazil. Geological Journal, 18: 53-75},
	year = {1983},
	note = {LOWELL, G.R. and VILLAS, R.N. 1983. Petrology of nepheline syenite gneiss from Amazonian Brazil. Geological Journal, 18: 53-75}
}
