Sandburg, Carl (1953). Always the Young Strangers. New York: Harcourt, Brace and Company. стр. 29, 39. Sandburg's father's last name was originally "Danielson" or "Sturm". He could read but not write, and he accepted whatever spelling other people used. The young Carl, sister Mary, and brother Mart changed the spelling to "Sandburg" when in elementary school.