The copyright notices are there to provide recourse in the event of abuse, not to keep you from using this material. Educators may reproduce an unlimited number of copies of any of my documents published here for distribution without charge to students. You must reproduce the material unchanged, including retaining the copyright notice. Educators, bookstores, copy shops, academic departments and the like may reproduce an unlimited number of copies of any of my documents published here for sale to students at a price that does not significantly exceed the cost of duplication, stocking and sale. You must reproduce the material unchanged, including retaining the copyright notice.
Electronic copying requires specific permission beyond that granted here.
In a few cases, generous people have allowed me to republish their material on my Web page. If you want to use such material, please contact the author of the material directly. This permission to copy covers only my own work. If you are reproducing this material for free distribution to students, or for sale at a price that recovers cost, your copying and printing service may require a copyright release letter. You will find a generic letter here.