LeWITT, Sol. Incomplete Open Cubes.

(Amsterdam): Art & Project, 1975.  First edition.  Quarto. Single sheet folded in two.  Issued as ‘bulletin 88’ to accompany the event of the same title March 4 – March 15, 1975.  Double-page illustration (photographed by Akirahagihara).  Single sheet measuring 29cm by 42cm folded to 29cm by 21cm.  addressed and creased where folded for mailing. Nice fresh copy.