[SIGCIS-Members] Codes of ethics/conduct in engineering

Hi all, I'm looking for historical studies on codes of ethics or codes of conduct for engineers--codes created by and for practitioners in a particular field, such as electrical engineering. I would like to find articles or books that evaluate and explain the evolution of some professional engineering codes of conduct/ethics over time, either specific to one field or more broadly for engineering in general. Does anyone know of any references? Thanks, Marie ______________________ Marie Hicks, Ph.D. Asst. Professor, History of Technology Illinois Institute of Technology Chicago, IL USA mariehicks.net | mhicks1@iit.edu | @histoftech