THE POWDERY mildews 
/edited by D.M. Spencer 
 - London  Academic press  1978 
 - xix, 565 p. 
<br/><br/> Includes index.<br/> 
<br/><br/><label>ISBN: </label>126568502 
<br/><br/><label>Dewey Class. No.: </label>589.23  / POW