Commire, Anne, ed. Something about the Author. Vol. 5. Detroit: Gale Research, 1973. Includes a detailed list of books and awards won by Sommerfelt. The entry also has a brief biographical sketch with the author's account of her travels, family life, and aims as a writer.

DeMontreville, Doris, and Donna Hill, eds. Third Book of Junior Authors. New York: Wilson, 1972. Contains an autobiographical sketch in which Sommerfelt traces her writing talent to her childhood reading and inventions, and to her later travels to India and Mexico. As a writer, her aim was to sensitize young minds before adult prejudices could intrude.

Macbean, Margaret. "Long Trek." New York Times Book Review (October 1, 1961): 32. The author feels that Sommerfelt does not let her moralizing intrude and instead "allows the reader simply to share Lalu's adventures."

Moore, Opal, and Donnarae MacCann.

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