Thring, M. W. <br/><br/>
How to invent / 
M.W. Thring and E.R. Laithwaite. 
 - London :  Macmillan,  c1977. 
 - vii, 173 p. : ill. 
<br/><br/><label>ISBN: </label>0333177940 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions.<br/>Creative ability in technology.