Penha, Rui <br/><br/>
Acoustic impedance measurements. 

 - Lisboa:  Fundaçao Calouste Gulbenkian,  1987 
 - 624 p. 
<br/><br/> Inv. 2016  bib 
<br/><br/><label>LCCN: </label>true true 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Acnotica<br/>Medidas
<br/><br/><label>Universal Decimal Class. No.: </label>534.6 PEN. ac