Most US history encyclopedias are published as hardcover or paperback editions.
These encyclopedias are aimed at students, teachers, researchers, and general readers and are commonly recommended for student reports, classroom use, academic and public library collections, and research reference.
Common back matter and research aids include chronologies, timelines, primary-document appendices or excerpts, bibliographies or suggested reading lists, maps, indexes, and numerous photos or illustrations.
They use a mix of approaches, including biographical entries and profiles, thematic or topical essays, cross-disciplinary contributions, primary-source excerpts, timelines, and bibliographic references.
Physical sizes vary by title; sample dimensions range roughly from 9.1 to 12.1 inches in height, 6.1 to 9.4 inches in width, 0.69 to 3.0 inches in thickness, with weights from about 1.2 to 9.6 pounds.
