a file of bibliographic records, created according to specific and uniform principles of construction and under the control of an authority file that describes the materials contained in a collection, library, or group of libraries (Levine-Clark & Carter, 2013).
Levine-Clark, M., & Carter, T.M. (Eds.). (2013). ALA glossary of library and information science (4th ed.). Chicago: ALA Editions.
MIT Libraries. (n.d.). Boolean operators. Retrieved from http://libguides.mit.edu/c.php?g=175963&p=1158594
The Library of Congress. (2014, Oct. 1). Library of congress classification. Retrieved from http://www.loc.gov/catdir/cpso/lcc.html