NAUMAN, BRUCE. CLEA RSKY. [CLEAR SKY]. Offset printed photographic illustrations. 4to (12 x 12 inches), original stapled white wrappers printed in black, minor evidence of handling. First edition of an unknown limitation, with Nauman's signature in manuscript (not printed) on the back wrapper. "Responding to artist's books by Ed Ruscha that depict Los Angeles icons, Nauman created two books of his own that focus on images of that city. This work presents photographs of sunshine while the companion volume [LAAIR / LA AIR (1970)] deals with smog." -- from "Bruce Nauman [Catalogue Raisonné]." ]New York: Leo Castelli Gallery, 1968]