EASTAWAY RAO <br/><br/>
Maths on the Back of an Envelope  English 

 - 1 
 - London  HarperCollins  2019 
 - 200p. 
<br/><br/><label>ISBN: </label>9780008389031 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Mathematics
<br/><br/><label>Dewey Class. No.: </label>510  / EAR M