Book 10,264 Thesis 2,077 Serial 224 Journal 121 Conference Proceeding 102 Electronic 74 Book Chapter 30 Unknown 30 Government Document 24 Manuscript 9 Audio 7 Kit 7 Photo 4 Map 3 Physical Object 1 Reference Material 1 see all ...

British Intelligence Objectives Sub-Committee 69 Humboldt, Alexander von, 1769-1859 65 Edgar Fahs Smith Memorial Collection (University of Pennsylvania) 61 De Gruyter 52 Edward Potts Cheyney Memorial Fund 47 History of Science Collection (Brown University) 47 Germany (Territory under Allied occupation, 1945-1955 : U.S. Zone) Field Information Agency, Technical 32 Max-Planck-Gesellschaft zur Förderung der Wissenschaften 28 ebrary, Inc 26 Deutsche Akademie der Naturforscher Leopoldina 24 Deutsche Forschungsgemeinschaft 24 Garcke, Aug (August), 1819-1904 22 Hoffmann, Dieter, 1948- 22 Koch, Wilhelm Daniel Joseph, 1771-1849 21 Helmholtz, Hermann von, 1821-1894 20 Staatliches Museum für Naturkunde in Stuttgart 20 Reich, Karin, 1941- 19 Tobies, Renate 19 Wünsche, Otto, 1839-1905 19 Geinitz, Hanns Bruno, 1814-1900 18 Max-Planck-Gesellschaft zur Förderung der Wissenschaften 18 Ostwald, Wilhelm, 1853-1932 18 Haeckel, Ernst, 1834-1919 17 Liebig, Justus, Freiherr von, 1803-1873 17 Preussische Geologische Landesanstalt 17 ProQuest (Firm) 17 Gauss, Carl Friedrich, 1777-1855 16 Knobloch, Eberhard 16 Walker, Mark, 1959- 16 Lemmerich, J 15 see all ...

German 8,639 English 1,750 Latin 496 French 218 Russian 87 Spanish 60 Italian 49 Hebrew 19 Dutch 17 Polish 14 Portuguese 11 Czech 10 Undetermined 9 Japanese 8 Chinese 7 Arabic 6 Danish 6 No linguistic content 6 Greek 5 Multiple 5 Ancient Greek 4 Estonian 4 Swedish 4 Korean 2 Norwegian 2 Turkish 2 Western Frisian 2 Hungarian 1 Middle English 1 Oriya 1 see all ...

Biography 1,612 History 1,230 Biographies 971 Academic theses 518 Thèses et écrits académiques 466 Congresses 268 Correspondence 259 Early works to 1800 254 Academic Dissertation 242 Periodicals 237 dissertations 207 doctoral dissertations 205 theses 205 masters theses 204 Electronic books 192 Conference papers and proceedings 191 Dictionaries 165 Early works 148 Hochschulschrift 132 Records and correspondence 130 Pictorial works 117 Guidebooks 113 Personal correspondence 112 Exhibitions 107 Catalogs 103 Technical reports 101 Exhibition catalogs 82 Classification 81 Bibliography 74 Catalogs and collections 56 see all ...

20th century 413 19th century 291 1900-1999 205 1769-1859 173 1800-1899 123 18th century 114 1879-1955 104 Devonian 86 17th century 77 Jurassic 75 1900 - 1999 62 1933-1945 61 Early works to 1800 61 1777-1855 60 1571-1630 59 Cretaceous 58 16th century 56 From 345 to 405 million years ago 56 Tertiary 56 Carboniferous 55 Triassic 55 1901-1976 52 1939-1945 46 1700-1799 45 Pleistocene 43 1803-1873 42 1834-1919 42 1821-1894 40 From 140 to 190 million years ago 39 From 2 to 65 million years ago 39 see all ...