Countries of the world and their leaders yearbook, 2007.

Contemporary authors cumulative index Contemporary authors, volumes 1-210 ; Contemporary authors new revision series, volumes 1-118.

Contemporary authors cumulative index Contemporary authors, volumes 1-206 ; Contemporary authors new revision series, volumes 1-114.

Political theories for students

(viewed 27 February 2014)

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World education encyclopedia a survey of educational systems worldwide

Available for University of the Philippines Baguio with URL: http://go.galegroup.com/ps/i.do?id=GALE|5BTR&v=2.1&u=phdiliman&it=aboutBook&p=GVRL&sw=w&id=GALE|5BTR. Click here to request

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The Gale encyclopedia of genetic disorders

Science of everyday things