Keep in mind that most museums have libraries. Do not hesitate to contact the museum library directly. If a traveling exhibition has been generated at a particular museum they most likely may have more information in their library. Curators can also be wonderful sources of information.
Keep in mind you must register once to use inter library loan and it will be active for the entire time you are a SU student.
World Cat is a good venue to see what has been published and collected by university libraries around the world on your topic. If we do not own the book order it (for free) through inter library loan. I am also happy to take suggestions for books you think the library should own.