books.google.com - "The early 20th-century in America was characterized by technological advancements. Chief among these was the rapid replacement of horse-drawn vehicles by gasoline-powered cars, which necessitated a nationwide network of paved highways and filling stations. Concern over unchecked industrialization and...http://books.google.com/books/about/Handbook_to_Life_in_America.html?id=dYwn0je9MfYC&utm_source=gb-gplus-shareHandbook to Life in America
