By Bullen, K. E.
By Shakespeare, WILLIAM, Butler, Martin
By British Museum
By Singer, Peter
By Vulliamy
By Various Authors
By Clark, Ian
By Gurr, Andrew
By Putnam
By Saunders, Peter
By Thompson, Denys
By Yudkin, Michael
By Phillips, O. M.
By Hoare, Tony
By Timothy P. Bayliss-Smith, Bayliss-Smith, Timothy P.
By Horowitz, Paul, Hill, Winfield
By Floud, Roderick, McCloskey, D. N.
By Reynolds, Donald M.
By Annie Shaver-Crandell
By Ball, Stephen
By Hough, Graham
By di Francia, Giuliano
By Yeo, Peter F., Corbet, Sarah A.
By Eisenstein, Elizabeth L.
By Letts, Rosa Maria
By George Boolos, Richard C. Jeffrey, Boolos, George, Jeffrey, Richard C.
By School Mathematics Project
By Creel, Richard E.
By Conn, Peter.