@book{18692,
	author = {Penha, Rui and Rui Penha, Paulo de Noronha Pizarro.},
	title = {Acoustic impedance measurements.},
	publisher = {Fundaçao Calouste Gulbenkian,},
	year = {1987},
	address = {Lisboa:},
	note = {Inv. 2016}
}