Columbia subject headings:
Children's literature--History and criticism.
Literature, Modern--20th century--History and criticism.
Literature, Modern--21st century--History and criticism.
Time travel in literature.
Time travel in motion pictures.
Young adult literature--History and criticism.
Harvard subject headings:
Children's literature--History and criticism
Literature--20th century--History and criticism.
Literature--21st century--History and criticism.
Time travel in literature.
Time travel in motion pictures.
Young adult literature--History and criticism
Princeton subject headings:
Children's literature--History and criticism.
Literature--20th century--History and criticism.
Literature--21st century--History and criticism.
Time travel in literature.
Time travel in motion pictures.
Young adult literature--History and criticism.