It is best to contact the publisher's copyright permission department to determine whether the work is still under copyright or in the public domain. I used this material last semester with permission. However, you should check to see if the publisher restricted or permitted, or put conditions on, reuse. The absence of a copyright notice does not mean that the work in question is not protected. The best method for determining copyright ownership is by contacting the publisher of the work that you wish to copy.
Classes start next week.
If a bookstore, copyshop or professor sells or distributes copyrighted materials that have been improperly copied, they can be subject to a lawsuit, found liable for copyright infringement and subjected to all penalties and remedies for the infrigement. IF faculty request course materials at the same time they place their book orders, permission should easily be cleared in time for the start of classes. However, this is dependent upon the particular publisher's permissions process as well as the timing of the faculty request. The absence of a response does not qualify one to copy. You should not begin copying the material before receiving permission.