| 其他書名 | Practices and Promises : a Document Submitted in Partial Fulfillment ... for the Degrees of Master of Science (Natural Resources) and Master of Science (Water Resources Management) ... |
| 出版 | University of Michigan, 1989 |
| URL | http://books.google.com.hk/books?id=OBjgcjLZPvsC&hl=&source=gbs_api |