R. D. MacElroy | K. Kreuzberg | S. Nielsen
Natural and Artificial Ecosystems
Proceedings of F4.1, F4.2, F4.5, F4.7, F4.8 and F4.10. Meetings of Cospar Scientific Commission F Which Were Held during the Thirtieth Cospar Scientific Assembly, Hamburg, Germany, 11-21 July 1994