History 13 Congresses 11 Biography 8 Dictionaries 7 Periodicals 7 Handbooks, manuals, etc 5 Criticism, interpretation, etc 2 Encyclopedias 2 Handbooks and manuals 2 Miscellanea 2 Problems, exercises, etc 2 Readers 2 Textbooks for foreign speakers 2 Bibliography 1 Collections 1 Documentary films 1 Drama 1 Early works to 1800 1 Essays 1 Instructional and educational works 1 Juvenile literature 1 Nonfiction films 1 Outlines, syllabi, etc 1 Popular works 1 Social problem films 1 Statistics 1 Terminology 1 Video recordings for the hearing impaired 1