Yi, Yong-t'ae 이용태 <br/><br/>
Chigu ^nun tunggûlta 지구는 둥글다   
Yi, Yong-t'ae 이용태 
 - P'yôngyang  1957  교육도서출판사  1957 
 - 205 p. 
<br/><br/>North Korean orthography for the author is ??┐ù┼┬ 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography -- General -- School Text book -- DRK