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1
Lazarus, Richard S., 180-L71r
| Prentice-Hall |
1974
180-L71r,
3
Lazarus, Lawrence W, 516.98-L431e
| Springer publishing company |
1988
516.98-L431e,
4
Hatch, Evelyn, 701.07-H361r
| Newbury House Publishers |
1991
701.07-H361r,
5
Lazaro, Timothy R, 454.99-L431u
| Ann Arbor Science |
1979
454.99-L431u,
6
Ganz, Carl, 005.711-G211c
| 삼각형 |
1996
005.711-G211c,