It's a joke but a serious one :  Text book middle school students / 
R. Alaverdyan, S.  Hovhannisyan  and others ;  English translation M. Mikayelyan, E. Herosian.                                                            
 - Yerevan :  2013. 
 - 59 p. ;  26 cm. 
<br/><br/><label>ISBN: </label>9789939831115 
<br/><br/><b>საგნობრივი რუბრიკები: </b><br/>It's a joke but a serious one <br/>Text book middle school students 
<br/><br/><b>სხვა ავტორები: </b>Alaverdyan, R. ; Hovhannisyan, S. ; Mikayelyan, M.  ; Herosian, E. ; 
<br/><br/><label>დამ. კოლ. ავტორი: </label>Ministry of emergency situation of republic of Armenia crisis management state Academy 
<br/><br/><b>UDC: </b>373:087 I-87