Warner, Gertrude Chandler,  1890- <br/><br/>
Bicycle mystery. 
Illustrated by David Cunningham. 
 - Chicago,  A. Whitman  [1970] 
 - 127 p.  illus.  22 cm. 
 - Albert Whitman pilot books .
<br/><br/> While on bicycle trip to their aunt's farm, the four Aldens help solve a mystery. 
<br/><br/><label>ISBN: </label>0807507083 :  $10.95 
<br/><br/><label>LCCN: </label>79126428 /AC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mystery and detective stories.
<br/><br/><label>LC Class. No.: </label>PZ7.W244  / Bi 
<br/><br/><label>Dewey Class. No.: </label>[Fic]