Ngay moi :  ky / 
[Hong Phi] ... [et al.]. 
 - Hanoi :  Van Hoc,  1974. 
 - 188 p. ;  20 cm. 
<br/><br/><label>LCCN: </label>ltf96006591  
<br/><br/><label>LC Class. No.: </label>PL4378.8  / .N5