These authors' works have the subjects "siblings" and "making friends."

These authors' works have the subjects "nine-year-old girls," "aunt and niece," and "eleven-year-old girls."

These authors' works have the subjects "friendship," "aunt and niece," and "siblings."

These authors' works have the subjects "nine-year-old girls," "making friends," and "twelve-year-old girls."

These authors' works have the subjects "siblings," "sisters," and "cousins."

These authors' works have the subject "making friends."

These authors' works have the subjects "making friends" and "new students."

These authors' works have the subjects "nine-year-old girls," "world war ii," and "boarding schools."

These authors' works have the subjects "nine-year-old girls," "poor children," and "eleven-year-old girls."

These authors' works have the subjects "poor children," "children of divorced parents," and "poor families."

These authors' works have the subjects "siblings," "making friends," and "sisters."

These authors' works have the subjects "siblings," "making friends," and "sisters."