Statistics 65,627 Periodicals 33,896 Electronic books 3,227 Census data 1,974 Statistiques 1,950 Census 1,795 History 1,793 Congresses 1,636 Bibliography 1,515 Databases 1,186 Conference papers and proceedings 1,175 Census, 1990 1,026 Maps 785 Handbooks, manuals, etc 780 Directories 756 Statistics, Vital 699 Bibliographies 529 Statistics, Medical 512 Periodical 497 Vital statistics 496 Handbooks and manuals 456 Tables 431 CD-ROMs 426 Internet videos 384 Catalogs 364 Dictionaries 359 Medical 356 Academic theses 353 Vital 351 Problems, exercises, etc 348 Census, 1980 339 Périodiques 335 Charts, diagrams, etc 308 Government publications 260 Sources 239 Medical statistics 237 Indexes 223 Textbooks 220 Census, 1991 215 Case studies 214 Electronic journals 192 statistics 186 Census, 1981 176 Périodiques 154 Congress 152 Classification 151 periodicals 148 Problems and exercises 141 Yearbooks 137 Early works to 1800 123 Instructional films 116 Longitudinal studies 110 Biography 104 Tables (Data) 100 Serial publications 98 Educational films 97 Abstracts 92 Reference works 91 Computer network resources 90 Census, 1970 89 Software 88 Census, 2000 85 Cross-cultural studies 83 Registers 74 cuadros estadísticos 72 statistical table 72 tableau statistique 72 Atlases 71 Electronic book 69 Early works 68 Thèses et écrits académiques 68 Census, 1971 65 Handbook 64 Rules and practice 64 Surveys 64 Encyclopedias 62 Graphs 62 Terminology 60 Internet resource 59 bibliography 58 Statistik 57 Gazetteers 55 Geographic information systems data 55 Registers (Lists) 55 Geospatial data 54 bibliografía 54 bibliographie 54 Guides et manuels 50 Facsimiles 49 Programmed instruction 48 graph 47 graphique 47 gráfico 47 Biographies 46 Festschriften 46 Congrès 45 Legislative materials 43 Outlines, syllabi, etc 43 reference 43 referencia 43