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REFERENCE Directory Home Reference | Submit your Site | Search the Directory: CATEGORIES Related Categories: · Directory > Science > Reference (6) Sub-Categories: · Almanacs (31) · Archives (31) · Ask an Expert (69) · Bibliography (4) · Biography (23) · Blogs (2,682) · Books (118) · Dictionaries (24) · Directories (484) · Education (646) · Encyclopedias (25) · Flags (4) · Geography (16) · Journals (18) · Knots (2) · Knowledge Management (47) · Libraries (5) · Maps (9) · Museums (2) · Open Access Resources (53) · Other (116) · Questions and Answers (28) · Quotations (22) · Scientific Reference (10) · Style Guides (9) · Time (13) · World Records (4) SPONSORED LISTINGS(what's this?)       Wishcastle.com   Online merchant offering decor, bulk lots, gift cards and gift ideas. Home, garden, office, indoor and outdoor furnishings. Category: Directory > Shopping > Home and Garden http://www.wishcastle.com/ - Added: (03.17.2008) - more info       Number 1 Banner Exchange   Number 1 banner exchange is completely free and you can double even triple your hit ratio. Join today and receive 1000 free banner impressions. We are the only banner exchange network offering 1:1 banner display ratio! Category: Directory > Computers > Advertising and Marketing http://www.no1bannerexchange.com/ - Added: (09.18.2006) - more info