So you want to be a Librarian? Watch this Vocational Guidance Film: The Librarian (1947).
This 10 minute film includes information on becoming a librarian, types of jobs, types of libraries, bookmobiles, Library of Congress, a few sexist comments and more. Fun to watch, especially for a peak into history. Sad to hear the voiceover announce there is a 'need for thousands of trained librarians'.