Picasso's concrete sculptures / by Sally Fairweather. - New York : Hudson Hills press, [c.1982]. - 158 p. : ill. ; 30 cm.см.. - ბიბლიოგრ. გვ. 157. - ISBN 0-933920-28-8[MFN: 40713]
Content: Catalogue I: Picasso/Nesjar works in Betograve; Catalogue II: Works approved by Picasso, not executed