21
Um Chang-Ok, 911.059-U48bb
| The commenmorative association of the national Debt redmeption movement |
1990
911.059-U48bb,
22
Kim Eungho, 539.2-K49mm
| Republic of Korea ministry of environment |
539.2-K49mm,
24
Lee,Thomas H., 569.8-L481dd
| cambridge |
2004
569.8-L481dd,
1
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