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As the document is not on line, I am going to ask for the exact quote that supports: "Landfield was one of the first painters who led the move away from Minimalism and Hard-edge painting to Lyrical Abstraction" in particular, the claim "one of the first". Incidentally do these catalogs have a personal author or were they issued in the name of the gallery? DGG (talk) 05:16, 1 April 2009 (UTC)
Such claims do need to be sourced, but catalogs from 1970 are hard to come by, and virtually nonexistent online. This doesn't strike one as a claim inconsistent with the events cited in the article. As one of the artists in the Aldrich Museum show, Landfield would have been an early practitioner of Lyrical Abstraction painting. Here  is an online transcript, from the Smithsonian archives, of a 1972 interview with Larry Aldrich of the Aldrich Museum, in which Landfield is cited several times by Aldrich as one of 32 artists included in the museum's seminal show of Lyrical Abstraction. Aldrich recalls that the exhibition was reviewed by both Time and Newsweek. Apparently Aldrich is credited with coining the 'L.A.' term in this country, in coordination with the exhibition, which continued to the Whitney Museum. The transcripts are lengthy, but cover events in a chronological fashion, and the relevant material is about 2/3 to 3/4 of the way down the page. Over the next week I am going to try to find a copy of the museum catalog. Thanks. JNW (talk) 22:55, 2 April 2009 (UTC)
Another relevant mention online, this time on the opening page of a jstor article, in which Landfield is characterized as one of 'the most notable' of the young lyrical abstraction painters of the late 60s. . JNW (talk) 00:32, 3 April 2009 (UTC)
I now have copies of the brochure from the 1970 Aldrich show, as well as the 2007 Butler, and have added quotes verbatim from the museums' directors, which should be helpful in addressing concerns about his role in abstract painting in the 60s. Some copy edits and clean-up as well. JNW (talk) 03:24, 11 April 2009 (UTC)