. . "Supercross Ouvrages pour la jeunesse." . . . "Supercross and arenacross : taking MX indoors" . "Supercross and arenacross : taking MX indoors"@en . . . . "Juvenile works" . "Juvenile works"@en . "Supercross and Arenacross"@en . . "Presents a history of supercross racing, which is done inside on man-made dirt tracks, as well as information about the equipment used, skills required, and safety measures involved." . "Presents a history of supercross racing, which is done inside on man-made dirt tracks, as well as information about the equipment used, skills required, and safety measures involved."@en . . . . . . "Supercross and arenacross" .