[10] Davidson Fans  1909 Magazine

[11] American Blower Fans  1994 Book

[12] Sutcliffe Fans  1905 Book

[13] Keith Fans - 1  1908 Booklet

[14] Keith - 2 Patent Dispute  1911 Booklet

[15] Clarage Fans  1927 Catalogue

[16] Matthews & Yates Fans  1930 Catalogue

[17] Sources of Information