"United States" . . "West (U.s.) Juvenile Literature." . . . "Exploring the Frontier A Sourcebook on the American West"@en . "Describes and illustrates the exploration of the American frontier from 1776 to the late nineteenth century, through a variety of images created during that period." . . . . . . . "Exploring the frontier : a sourcebook on the American West" . . . . . . . . . . "Electronic books"@en . . "Juvenile works" . . "West (U.s.) History Sources." . . "EBSCO Publishing (Firm)" . . "Frontier and Pioneer Life Juvenile Literature." . . "West (U.S.)" . . "West (U.s.)" . . .