| 其他書名 | a symposium of N.J.F. 28. August - 1. September 1977 : proceedings |
| 出版 | Scandinavian Association of Agricultural Scientists and the Royal Swedish Academy of Agriculture and Forestry, 1979 |
| URL | http://books.google.com.hk/books?id=ioeyoAEACAAJ&hl=&source=gbs_api |