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