The Gale Encyclopedia of the Unusual and Unexplained
UXL Encyclopedia of World Biography
Reference Guide to World Literature
Learning and Memory: Macmillan Psychology Reference Series
St. James Encyclopedia of Labor History Worldwide
Nonfiction Classics for Students
Industrial Revolution Reference Library
Great Depression and the New Deal Reference Library
Geo-Data: World Geographic Encyclopedia
CDs, Super Glue, & Salsa: How Everyday Products Are Made
Renaissance and Reformation Reference Library