@INPROCEEDINGS {HERREN:1994, title = {Ecologically sustainable and environmentally sound approach to plant protection in land management}, author = {Herren, H. R. and Tamo, M. }, editor = {Wood, R. C. and Dumanski, J. }, booktitle = {International Workshop on Sustainable Land Management for the 21st Century, 20-26 June 1993, Lethbridge, Canada}, year = {1994}, pages = {97--111}, publisher = {University of Lethbridge}, address = {Lethbridge, Canada}, }