Scientific American 253 

 - New York  Sciam  Dez. 1985 
 - 136 
 - 20100310 
 - Scientific American  253 .
<br/><br/><label>ISSN: </label>1679-656X 
<br/><br/><label>Dewey Class. No.: </label>SAM 2010  / 2010