American Inaugurals: The Speeches, The Presidents, and Their Times cover Earth Science cover Employment cover Geography cover Geology cover Health and Wellness cover Human Evolution cover Personal Finance cover Philosophy: Environmental Ethics cover Philosophy: Medical Ethics cover Physical Science cover Social Skills cover Space Exploration cover UXL Civics cover UXL Encyclopedia of Weather and Natural Disasters, ed. 2 cover Worldmark Encyclopedia of Religious Practices, ed. 2 cover Worldmark Encyclopedia of the Nations, ed. 14 cover