| 其他書名 | Prepared as a Part of the Exhibit of John Wanamaker Philadelphia and New York, the American University of Trade and Applied Commerce in Industrial and Occupational Hygiene |
| 出版 | publisher not identified, 1912 |
| URL | http://books.google.com.hk/books?id=EQPptgAACAAJ&hl=&source=gbs_api |