. . "Literatura juvenil Estados Unidos Siglo XX." . . "Correo Estados Unidos (Oeste) Historia." . . . . . . . "Riders of the Pony express" . . "Frontier and pioneer life" . "Fiction"@en . . . "Juvenile works"@en . "Juvenile works" . "Riders of the pony express"@en . "A true story of the courageous young riders of the Pony express." . . . "An account of the young men, who carried the mail by pony express almost two thousand miles in ten days, over blizzard-swept mountains, across hot desserts, and through hostile Indian country, from San Francisco to St. Joseph, Missouri."@en . . . . . . "Riders of the Pony Express" . . "Riders of the Pony Express"@en . "Chronicles the eighteen-month operation of the Pony Express, explaining why and how it was created, describing the challenges faced by riders, and discussing." . . .