| 其他書名 | Reprint of Engineering Bulletin No. 6 Prepared by the United States Fuel Administration in Collaboration with the Bureau of Mines |
| 出版 | U.S. Government Printing Office, 1919 |
| URL | http://books.google.com.hk/books?id=eVd3r73qlVsC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |