| 其他書名 | A Pilot Study. Working stresses for eastern spruce structural lumber as predicted by an electro-mechanical stress rating system |
| 出版 | University of Maine, Life Sciences and Agriculture Experiment Station, 1970 |
| URL | http://books.google.com.hk/books?id=gjtXeUwXLIkC&hl=&source=gbs_api |