Röhl John C G <br/><br/>
Purple secret :  genes, 'madness' and the royal houses of Europe / 
John C. G. Rohl, Martin Warren & David Hunt. 
 - [England] :  Corgi Books,  1999. 
 - 410 p., [8] p. of plates :  ill. ;  20 cm. 
<br/><br/>Includes bibliographical references (p. 342-[397]) and index. 
<br/><br/><label>ISBN: </label>0552145505 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Porphyria<br/>Porphyria--Genetic aspects<br/>Royal houses
<br/><br/><label>LC Class. No.: </label>W3 
<br/><br/><label>Dewey Class. No.: </label>616.3/99