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다국어입력
1
Bertsch , Gary K., 349.9-B551e | Routledge | 1999 349.9-B551e,
2
3
Bertsch, Gary K, 301.53-B551c | W. H. Freeman and Company | 1976 301.53-B551c,
4
Bertsch, Gary K, 301.53-B551c | W. H. Freeman and Company | 1976 301.53-B551c,
5
Bertsch, Gary K, 301.53-B548p | Dellen Publishing | 1986 301.53-B548p,