Follin, Frances. Embodied visions : Bridget Riley, Op art and the sixties / Frances Follin. - London : Thames & Hudson, 2004. - 263p : ill. ; 23 cm. ISBN: 0500976430 : £18.95 9780500976432 Subjects--Personal Names: Riley, Bridget, 1931- Subjects--Topical Terms: Optical art--Great Britain.