Many ULS libraries have children's literature collections. In addition to the collection at Bradford, there is also one at Greensburg, Johnstown and Pittsburgh. Some collections contain both print and non-print items, such as DVD's. To find resources at any of these locations, search PITTCat+. For example, if you search for the reference title 100 Most Popular Children's Authors, you will discover that it is available at the Bradford Library, through ULS Storage, and that it can be also be viewed online as an ebook.
Simply click on the link to access any of these titles.