@incollection{weko_26485_1, author = "Knut,H. Alfsen", title = "part iii natural resource and environmental accounting: the nordic experience : 9 why natural resource accounting?", booktitle = "Forest Resource Accounting: The Nordic Experience and Asian Experiments", publisher = "Institute of Developing Economies", year = "1997", volume = "", number = "", pages = "229--247" }