laughlin w s <br/><br/>
Human variation and origins 

<br/><br/><label>ISBN: </label>SL0268691 
<br/><br/><label>Standard No.: </label>196237 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>Y17:G:66, K71