Congresses 18 Periodicals 18 Handbooks, manuals, etc 17 Electronic books 8 History 7 Statistics 7 Documentary films 5 Legislative materials 5 Nonfiction films 4 Feature films 2 Statutes and codes 2 Biographical films 1 Biographical television programs 1 Biography 1 Databases 1 Directories 1 Documentary television programs 1 Documentary-style films 1 Drama 1 Electronic book 1 Electronic journals 1 Fiction films 1 Film adaptations 1 Job descriptions 1 Juvenile literature 1 Legislative hearings 1 Rules and practice 1 Television news programs 1