Change and Technology in the United States A Resource Book for Studying the Geography and History of Technology Stephen Petrina Including: 12 Printable Maps Showing 700+ Inventions from 1787-1987 279 Technological Events 32 Graphs and Tables of Historical Trends 5 Timelines of Innovation and Labor with Pictures Plus: 3 Tables for Cross-Referencing Standards 50 Links to WWW Resources and Portals 50+ Resource Articles, CDs, Books & Videos