The Proceedings of the International Congress on International Environmental Modelling and Software (iEMSs 2008) are available here: https://scholarsarchive.byu.edu/iemssconference/2008/
The proceedings are also available as three separate volumes, with page numbers:
How to cite
Miquel Sànchez-Marrè, Javier Béjar, Joaquim Comas, Andrea E. Rizzoli, Giorgio Guariso (Eds.)
Proceedings of the iEMSs Fourth Biennial Meeting: International Congress on Environmental Modelling and Software (iEMSs 2008).
International Environmental Modelling and Software Society, Barcelona, Catalonia, July 2008.ISBN: 978-84-7653-074-0