Snyder, Zilpha Keatley. <br/><br/>
Black and blue magic / 
Zilpha Keatley Snyder ; drawings by Gene Holtan. 
 - New York :  Dell,  [1988], 1966. 
 - 186 p. :  ill. ;  20 cm. 
<br/><br/> "A Yearling book." 
<br/><br/><label>ISBN: </label>0440400538 (pbk.) :  $3.25 9780440400530 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magic--Fiction.<br/>Magic--Juvenile fiction.
<br/><br/><label>LC Class. No.: </label>JUV PZ 7 .S68522  / Bl 1988