00573nam 2200205 k 4500001001300000005001500013008004100028020003400069020001500103040001900118056001100137090002100148100001400169245005800183260004000241300001700281653003800298950001100336049002000347KMO20070400020080819145529071122s1997 ulk 000 kor  a8985726048(1)g44400:c\5,5001 a8985726072 a146043c146043 a40424 a404b송68원c11 a송은영10a원리를 알면 과학이 쉽다.n1/d송은영 저 a서울:b도서출판 새날,c1997 a216p.;c23cm a원리를a알면a과학a쉽다0 b\5,5000 lEM0000012669v1