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Multilingual
1
Stanley, William D., 569.34-S789'o | Merrill Pub. Co | 1990 569.34-S789'o,
2
Sjoland, Henrik., 569.34-S625h | Kluwer Academic Publishers | 1999 569.34-S625h,
3
한국전파진흥협회., 569.34-한17무 | 한국전파진흥협회 | 1997 569.34-한17무,
4
Henderson, John, 569.34-H496e | Prentice Hall | 1991 569.34-H496e,
5
Stout, David F., 569.34-S889h | McGraw-Hill | 1981 569.34-S889h,