D - World History 33 G - Geography, Anthropology, Recreation 28 A - General Works 27 Q - Science 26 N - Fine Arts 19 Z - Library Science 15 M - Music 8 P - Language and Literature 7 B - Philosophy, Psychology, Religion 6 E - United States History 6 H - Social Science 6 C - Historical Sciences 5 J - Political Science 5 R - Medicine 5 K - Law 4 U - Military Science 3 S - Agriculture 2 T - Technology 2 L - Education 1 see all ...

SourceOECD (Online service) 114 Organisation for Economic Co-operation and Development 72 Ponti, Giorgio 24 Borgonovi, Francesca 12 Iaccarino, Fabrizio 8 Schupfer, Francesco, 1833-1925 8 Seitz, Helke 8 Thompson, Wendy 8 Italy Servizio geologico 7 Organisation de coopération et de développement économiques 7 Ortelius, Abraham, 1527-1598 7 Agence pour l'Energie Nucléaire 6 Barlow, Henry Clark, 1806-1876 6 Bayer, Andrea 6 Capellini, Giovanni, 1833-1922 6 Christiansen, Keith 6 Proto, Alessandra 6 Vieira, António, 1608-1697 6 AEN 5 L'Isle, Guillaume de, 1675-1726 5 Magini, Giovanni Antonio, 1555-1617 5 Manaresi, Francesco 5 NEA 5 Nuclear Energy Agency 5 Portugal and Brazil Digitization Project (John Carter Brown Library) 5 Bertoletti, Alice 4 Biagi, Federico 4 Bianchini, Marco 4 Bibbee, Alexandra 4 Bitat, Abdelfeteh 4 see all ...

English 452 Italian 244 French 84 Latin 41 German 33 Portuguese 6 Dutch 3 Spanish 3 Undetermined 3 Croatian 1 Japanese 1 Polish 1 Swedish 1 see all ...

Maps 62 Web sites 52 History 48 Early works to 1800 41 Sources 18 Biography 15 Bibliography 12 Early works 10 Early maps 9 Exhibitions 9 Pictorial works 7 Art 6 Guidebooks 5 Poetry 5 Bibliographies 4 Correspondence 4 Criticism, interpretation, etc 4 Statistics 4 Annotations (Provenance) 3 Bio-bibliography 3 Catalogs 3 Church history 3 Drama 3 Maps (documents) 3 Texts 3 Topographic maps 3 Albums 2 Amateur works 2 Art and the war 2 Commercial treaties 2 see all ...

1265-1321 42 16th century 21 19th century 17 15th century 14 18th century 13 17th century 8 1815-1870 6 20th century 6 To 1421 6 1268 - 1492 5 1268-1492 5 1714 5 1508-1797 4 Revolution of 1848 4 1500-1599 3 1508 - 1797 3 15th and 16th centuries 3 1606 3 476-1268 3 To 476 3 -1544 2 1165-1197 2 1420 - 1798 2 1420-1798 2 1429-1503 2 1449 or 1450-1515 2 1476-approximately 1563 2 14th century 2 1735 2 1800-1899 2 see all ...