The Gale Encyclopedia of the Unusual and Unexplained
Reference Guide to World Literature
Geo-Data: World Geographic Encyclopedia
St. James Encyclopedia of Labor History Worldwide
Industrial Revolution Reference Library
Learning and Memory: Macmillan Psychology Reference Series
CDs, Super Glue, & Salsa: How Everyday Products Are Made
Junior Worldmark Encyclopedia of Physical Geography
UXL Encyclopedia of World Biography
Worldmark Encyclopedia of National Economies