Paull, John <br/><br/>
Simple mechanics 
by John and Dorothy Paull ; illustrated by Drury Lane Studios. 
 - Loughborough, Leics.  Ladybird Books  c1982 
 - 51 p. 
<br/><br/><label>ISBN: </label>9780721406596 
<br/><br/><label>Subjects--Index Terms: </label>Mechanics