Press (ISBN 978-0-19-503205-5) Carver. International Plant Names Index. List of Bulletins by George Washington Carver 存档副本. [2006-06-15]. (原始内容存档于2006-08-30)
H., A History of Presidential Elections: From George Washington to Richard M. Nixon 3rd, New York: Macmillan, 1970 A history ofBritish Columbia, Chapter