Columbia subject headings:
Authors, English--20th century--Biography.
Mortimer, Penelope, 1918-1999--Childhood and youth.
Harvard subject headings:
Authors, English--20th century--Biography
Mortimer, Penelope, 1918---Biography--Youth.
Princeton subject headings:
Authors, English--20th century--Biography.
Mortimer, Penelope, 1918-1999--Childhood and youth.