I've been reading an old Metropolitan Museum of Art exhibition catalogue from 1972:
'Robert Motherwell's A La Pintura The Genesis of a Book'.
Since the catalogue is in black and white only, I decided to dig up good quality images of the etchings.
(I found them from Albright-Knox Art Gallery www.albrightknox.org site):
From the catalogue:
"A la pintura"
Book of original aquatints by Robert Motherwell, created at Universal Limited
Art Editions' studios. Etching, proofing and printing by Donn Steward. Type,
handset, handfed, printed by Juda Rosenberg. First typography proofs printed
by Esther Pullman. The copper plates were cancelled after printing.
Each book consists of 24 unbound pages on J. Green mould made [aper, hand
torn to 25 1/2 x 38 inches. Sheets authenticated by a unique seal, [seal staped]
hand stamped with edition number, and embossed with the seal of the
publisher. The artist has signed each book on the colophon page.
The poems "A la pintura" and the preface, excerpted from "La arboleda
perdida" are taken from "Selected Poems" by Rafael Alberti, edited and
translated by Ben Belitt.
The book is published as:
an edition of forty 1/40 through 40/40
eight Artist's proofs AP 1/8 through 8/8
two Printer's proofs PP 1/2 and 2/2
Published by Universal Limited Art Editions, West Islip, Long Island, New York; all rights reserved.
Tatyana Grosman, Director, September 1972.