Book 438,314 Thesis 43,722 Conference Proceeding 36,387 Electronic 29,217 Government Document 18,162 Kit 13,007 Unknown 12,414 Journal 11,774 Physical Object 9,351 Serial 7,938 Map 7,232 Manuscript 4,137 Audio 2,796 Book Chapter 1,168 Photo 700 Reference Material 387 Musical Score 217 Article 48 Newspaper 15 see all ...

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Electronic books 65,132 Congresses 43,195 Conference papers and proceedings 31,294 History 15,709 Periodicals 15,322 Early works to 1800 8,665 Internet videos 7,782 Maps 7,558 Biography 6,148 Academic theses 4,636 Biographies 4,630 Dictionaries 4,512 Educational films 4,164 Handbooks, manuals, etc 4,151 Early works 3,518 Criticism, interpretation, etc 3,374 Handbooks and manuals 3,301 Physical maps 3,169 Bibliography 2,738 Fiction 2,696 Textbooks 2,689 Academic dissertations 2,674 Video recordings 2,545 Technical reports 2,474 Electronic journals 2,454 Sound recordings 2,366 Congrès 2,318 Congress 2,125 Statistics 2,007 Drama 1,863 see all ...

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