Upland Public Library http://uplandpl.lib.ca.us/
Ontario Public Library http://www.ci.ontario.ca.us/library
Chaffey College Library http://www.chaffey.edu/Library/
Cal Poly Pomona Library http://www.csupomona.edu/~library/
Library of Congress Book Classification System. (Used in University and other Academic Libraries) http://www.loc.gov/catdir/cpso/lcco/lcco.html
Dewey Decimal Book Classification System. (Used in most K-12 school libraries and public libraries.) http://www.tnrdlib.bc.ca/dewey.html
Los Angeles Public Library http://www.lapl.org
Rancho Cucamonga Public Library. Now offering online tutoring in student CORE subject areas free to Rancho Cucamonga residents with a library card. May be utilized from 1 to 10:00 pm daily. Also available through Paul A. Biane library at Victoria Gardens. http://www.rcpl.lib.ca.us/