4
Widtsoe, John Andreas
| Project Gutenberg |
2012
E-Book
7
Dryzek, John S.
| Oxford University Press |
2000
대출가능
9
Spence, Gavin G.
| TAPPI |
1999
제적자료
10
신정숙
| 漢陽大學校 |
1994
제적자료
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