Mathematical Sciences Research Institute
Vaughan F.R. Jones
Vaughan Frederick Randal Jones
The Knotplot Site
The International Guild of Knot Tyers
Nicholas R. Cozzazarelli
Hendrick W. Lenstra, Jr.
Escher and the Droste Effect
Escher's Print Gallery at Stanford
Pi in the Pieterskerk (in Dutch)
Contact: George Paul Csicsery Zala Films PO Box 22833, Oakland, CA 94609 USA Tel: +1 510 428-9284 Email: geocsi@zalafilms.com www.zalafilms.com