| 其他書名 | Report 4, Posttensioned Concrete Beam Investigation with Laboratory Tests from June 1961 to September 1975 |
| 出版 | U.S. Waterways Experiment Station, 1977 |
| URL | http://books.google.com.hk/books?id=bB81_rOpP1oC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |