Very rare, original and now long deleted 10"  by Canadian artist Rodney Graham, a conceptual artist and long time Bruce Nauman associate that  subverts distinctions of format and genre, and the result is an entertaining and intelligent artist's ''book.'' "Getting it Together in the Country" consists of an LP and an extensive text insert. The LP contains recordings of Graham improvising on the guitar to the legendarily surrealistic mass love scene Michelangelo Antonioni's film "Zabriskie Point", and its cover is designed as a facsimile of the classical LP's put out by the Deutsche Grammaphone label. The book inside the LP jacket contains documentation of Graham's work as well as his meditations on the late Kurt Cobain and on Atonioni's ill-fated film. It is the latest in a long line of the masterpieces of postmodern, post-conceptual wit that have defined the career of this member of the ''Vancouver Group'' of avant-garde Canadian artists.