How to Reduce Bee Poisoning from Pesticides, D.F. Mayer, C.A. Johansen, C.R. Baird, PNW518, A Pacific Northwest Extension Publication, Washington, Oregon, Idaho, Copyright 1999 Washington State University. Includes an extensive list of toxic chemicals such as pesticides that affect bees. Bao gồm danh sách mở rộng các hóa chất độc hại như thuốc trừ sâu (WSU 1999 version of the same publication)
