

|  | 
				No information avaiable			 
				
					http://referencextract.org/				
							 
						popularity:
						 
							reference						 
							search						 
							library						 
							searchengine						 
							research						 
							searchengines						 
							libraries						 
							search_engines						 
							librarians						 
							web2.0						 | 
|  | 
					Subject trees arranged alphabetically and by UDC.				 
							similarity:
							 
							popularity:
							 
								reference							 
								research							 
								library							 
								directory							 
								internet							 
								search							 
								resources							 
								dewey							 
								academic							 
								libraries							 | 
|  | 
					Catalog of the web run by a confederation of volunteers.				 
							similarity:
							 
							popularity:
							 
								library							 
								reference							 
								research							 
								search							 
								directory							 
								information							 
								education							 
								books							 
								resources							 
								virtual							 | 
|  | 
					Find what you want in a library near you with WorldCat, a global catalog of library collections.				 
							similarity:
							 
							popularity:
							 
								library							 
								books							 
								reference							 
								search							 
								research							 
								catalog							 
								libraries							 
								tools							 
								book							 
								education							 | 
|  | 
					No information avaiable				 
							similarity:
							 
							popularity:
							 
								searchengine							 
								search							 
								research							 
								kids							 
								searchengines							 
								children							 
								reference							 
								library							 
								search_engines							 
								safety							 | 
|  | 
					Question answering and web search engine for children 7-14. Type in your question and click ask, see what kinds of questions other kids are asking, or browse ...				 
							similarity:
							 
							popularity:
							 
								kids							 
								searchengine							 
								search							 
								research							 
								resources							 
								reference							 
								searchengines							 
								education							 
								search_engines							 
								engine							 | 
|  | 
					No information avaiable				 
							similarity:
							 
							popularity:
							 
								search							 
								searchengine							 
								tools							 
								research							 
								searchengines							 
								web							 
								engine							 
								web2.0							 
								reference							 
								google							 | 
|  | 
					Ask a librarian: An online reference service from the Library of Congress that allows researchers to submit reference questions to Library of Congress reading rooms ...				 
							similarity:
							 
							popularity:
							 
								reference							 
								research							 
								library							 
								resources							 
								libraries							 
								links							 
								search							 
								loc							 
								directory							 
								web							 | 
|  | 
					A search engine for selected information and reference sites: art, social sciences,social issues,social problems, history, biography, magazines, newspapers, ...				 
							similarity:
							 
							popularity:
							 
								reference							 
								research							 
								search							 
								searchengine							 
								academic							 
								resources							 
								education							 
								library							 
								database							 
								web							 | 
|  | 
					Wolfram|Alpha gives you access to the world's facts, without searching. See what everyone is talking about.				 
							similarity:
							 
							popularity:
							 
								search							 
								tools							 
								searchengine							 
								reference							 
								science							 
								knowledge							 
								math							 
								wolfram							 
								research							 
								google							 | 
|  | 
					Allows you to search the "deep web" via a collection of databases and search engines, which you can customize. Searchers can also cluster results into topics and sort by relevance, speed, and source.				 
							similarity:
							 
							popularity:
							 
								search							 
								metasearch							 
								searchengine							 
								search_engines							 
								internet							 
								reference							 
								searchengines							 
								deepweb							 
								web							 
								research							 | 
 an example search result
			an example search result