00547nam 2200205 k 4500001001300000005001500013008004100028020002400069020002200093040001900115056001100134090001800145100001400163245005400177260002700231300001700258653003800275950001100313049001700324KMO20060371220060221170139060221s1997 ulk 000 kor  a8985726846:c\7,8001 a8985726870g44400 a123456c123456 a47224 a472b송68원1 a송은영10a원리를 알면 과학이 쉽다/d송은영 저 a서울:b새날,c1997 a256p.;c23cm a원리를a알면a과학a쉽다0 b\7,8000 lEM0000003903