John, S. <br/><br/>
Mendel(1822-1884)in 90 minutes / 
John, S. 
 - 1st ed. 
 - 78 p. ; 20 cm. 
<br/><br/><label>ISBN: </label>8173710767 
<br/><br/><label>Dewey Class. No.: </label>925