Signed copy of DAVID HOCKNEY: 23 LITHOGRAPHS 1978-1980 which was published by TYLER GRAPHICS in 1980. It is a 6" x 6" x 1/2" thick catalogue of images of lithographs Hockney released 1978 to 1980. The images are in color and B&W. The softcover catalogue is signed by Hockney in black marker on the title page. The catalogue is complete and is in good condition. There is foxing to the covers and some of the pages. There were a limited number of the catalogue that were signed.