1. Anderson , K. 2006 Analysis of Water Offset Programs for Implementation in the Ipswich River Watershed, Massachusetts Appendix of Selected Massachusetts Laws Bylaws, and Guidance http://ipswich-river.org/wp-content/uploads/2010/04/Analysis_of_Water_Offset_Programs_APPENDIX.pdf
2. California Health & Safety Code 2007
3. City of San Luis Obispo staff 2014 Personal communication