National Network of Invasive Plant Centers
National Sustainable Agriculture Information Service – Weeds
North American Invasive Species Management Association
Organic Weed Control – A Practical Guide
U.S. Department of Agriculture (USDA) Invasive Weed Management Unit
There are videos about weed management from the University of California on YouTube. Just be aware that when doing a search for “weed management videos,” you will certainly be referred to some sites that are more focused on marijuana than weeds.