| 其他書名 | The German-Americans, an invisible minority? / Comp. and ed. by Erwin Helms and Brian Tracy. America in focus. .... Pupil's book |
| 出版 | Schöningh, 1983 |
| ISBN | 35064103939783506410399 |
| URL | http://books.google.com.hk/books?id=djw_AAAACAAJ&hl=&source=gbs_api |