Christie, Agatha. <br/><br/>
N or M? 
Agatha Christie 
 - London:  Harper Collins Publishers,  1995. 
 - 217 p. ;  19 cm. 
<br/><br/><label>ISBN: </label>0006163017 
<br/><br/><label>Subjects--Topical Terms: </label><br/> 1.Beresford, Tommy (Fictitious character) --Fiction.2.Beresford, Tuppence (Fictitious character) --Fiction. 3.Private investigators --England --Fiction.4.Married people --Fiction.
<br/><br/><label>Dewey Class. No.: </label>823.912