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Reference books are either used very frequently—a dictionary or an atlas, for example—or very infrequently, such as a highly specialized concordance. Because some reference books are consulted by patrons too frequently to have enough copies and others so infrequently that replacing it would be difficult, libraries prefer to make them ...
Directory of FREE Online Books and FREE eBooks; The Online Books Page (See: Online Books Page, by John Mark Ockerbloom, University of Pennsylvania Libraries, University of Pennsylvania, Philadelphia, PA.) The Used and Rare Books Directory; E-Books Directory - Categorized Books, Short Reviews, Free Downloads
The largest online encyclopedias are general reference works, though there are also many specialized ones. Some online encyclopedias are editions of a print encyclopedia, such as Encyclopædia Britannica, whereas others have always existed online, such as Wikipedia.
Guide to Reference, published in 2008 as the online successor to Guide to Reference Books, was a selective guide to the best print and online reference sources.An editorial team of reference librarians and subject experts selected and annotated some 16,000 entries, which were organized by subject.
The Golm Metabolome Database (GMD) is a reference mass spectra library of biologically active metabolites quantified using gas chromatography (GC) coupled to mass spectrometry (MS). Free online search; offline use by subscription Golm Metabolome Database [67] Google Scholar: Multidisciplinary Free Google [68] HCI Bibliography: Human-computer ...
Indexes are commonly provided in many types of reference work. Updated editions are published as needed, in some cases annually. In comparison, a reference book or reference-only book in a library is one that may only be used in the library and not borrowed from the library. Many such books are reference works (in the first sense) which are ...