History 26 Bibliography 25 Catalogs 13 Genealogy 11 Sources 8 Politics and government 6 American literature 5 more ... Centennial celebrations, etc 4 Description and travel 4 Exhibitions 4 Libraries 4 African Americans 3 Books 3 Descriptive cataloging 3 Maps 3 Presidents 3 Prints, American 3 African American authors 2 Architecture 2 Cataloging of nonbook materials 2 Catalogs, Union 2 Church history 2 Civilization 2 Congresses 2 Copyright 2 Handbooks, manuals, etc 2 Historic buildings 2 Music 2 Musicians 2 Relations 2 State government publications 2 Union catalogs 2 Universal bibliography 2 Views 2 African American art 1 Almanacs, American 1 American Revolution Bicentennial 1 American newspapers 1 American wit and humor, Pictorial 1 Americana 1 less ...