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