Columbia subject headings:
Authors, American--20th century--Biography.
Fathers--United States--Biography.
Horticulturists--United States--Biography.
Powell, George Harold.
Powell, Lawrence Clark, 1906-2001--Family.
Harvard subject headings:
Authors, American--20th century--Biography
Authors, American--20th century--Family relationships
Fathers--United States--Biography
Horticulturists--United States--Biography.
Powell, George Harold.
Powell, Lawrence Clark, 1906-2001
Powell, Lawrence Clark, 1906-2001--Family.
Princeton subject headings:
Authors, American--20th century--Biography.
Fathers--United States--Biography.
Horticulturists--United States--Biography.
Powell, George Harold.
Powell, Lawrence Clark, 1906-2001--Biography--Family.