LEADER 00662cam a1100217 k 4500 001 20170600000000732 005 20170605115805 008 921019s1991 kn 000a kor 049 1 $lBE0000031152$v1991$fMS 085 $a3764 090 $6093-01$a6100$b인민3P 093 0 $6090-01$aEM0000057680$v1991$c(복)$y01 100 $a정영삼 130 0$a북한교과서 자연 245 $a자연 :$b인민학교 3 /$d정영삼;$e오익동;$e안성룡 공저. 250 $a07 판 260 $a평양:$b교육도서출판사,$c1991. 300 $a144p. ;$c23cm 506 $a일반 653 $a인민자연3$a자연인민3$a인민3$a자연3 950 $aW0000001