References:
- Milwaukee Metropolitan Sewerage District Weather Center
- University of Wisconsin Stevens Point Herbarium
- Invasive Plants Association of Wisconsin
- Wisconsin Public Land Survey Records
- Filtrexx Land Improvement Systems
- Floating Islands International
- US Composting Council
- USCC Certification Commission
- Bringing Nature Home
- Wild Ones
- Integrated Pest Management
- Pesticide Action Network
- Surfrider Foundation
