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         Allows to search for articles in journals published by Nature Publishing Group.  |  
    
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         The premier source for accessing unclassified reports from influential U.S. and international government agencies.  |  
    
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         Optics InfoBase is the online repository of The Optical Society of America. It contains the current and past volumes of its journals and recent conference proceedings.  |  
    
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         Traces the usage of words through 2.5 million quotations from a wide range of international English language sources.  |  
    
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         PEP - Psychoanalytic Electronic Publishing The Psychoanalytic Electronic Publishing corporation (PEP) is a not for profit corporation.   |  
    
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         Primo Central (Ex Libris) The Primo Central Index is a mega-aggregation of hundreds of millions of scholarly e-resources of global and regional importance. These include journal articles, e-books, reviews, legal documents and more that are harvested from primary and secondary publishers and aggregators, and from open-access ...  |  
    
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         ProQolid - Mapi Research Trust The Quality of Life Instruments Database (QOLID) project was initiated by Mapi Research Institute to provide all those involved in health care   |  
    
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         ProQuest 5000 is one of the most comprehensive online serials databases available today.   |  
    
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         ProQuest 5000 International (PQ) ProQuest 5000 is one of the most comprehensive online serials databases available today.   |