Here's a good series of PDFs about the history of pesticides from Scientific Beekeeping. The first one I opened is a series of images, i.e. scanned pages. It would be difficult to get the text from it.
It's an article from Barbara J. Erickson and Eric H. Erickson Jr. It's in the American Bee Journal from November 1983. At the end of the article there is a list of studies they quoted.