Valls Medina, Arturo <br/><br/>
Intraracial polymorphism in the human y chromosome / 
by Arturo Valls. 
 -- [S.l.] :   s.n.,   1968] 
 - [6] p. 
<br/><br/> Separata de : Portugaliae Acta Biologica, Serie A, vol. X, n. 3-4, p. 267-278 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cromosomas
<br/><br/><label>Universal Decimal Class. No.: </label>576.316