Deletion of The Pastellists

Comment: I don't see any viable reason to consider deleting this article and don't understand the nom. The fact that members didn't keep minutes of their meetings is not a pertinent matter, yet this is stated and ''The Evening Mail'' review of "progressive and gifted artists constituting this group"http://en.wikipedia.org/w/index.php?title=The_Pastellists&oldid=346589782#cite_note-3 is ignored. Having one show is not a reason to delete (cf ''Sensation (exhibition)|Sensation'') and is not even true. The article mentions four shows. The source alluded to in the nom (presumably Bolger) mentions the "second exhibition", which is visible in http://books.google.com/books?ei=PGRWSZbbB5bCyQTDnvwi&client=safari&id=fKNQAAAAMAAJ&dq=%22american+pastels+in+the+metropolitan%22&q=pastellists#search_anchor Google snippet view. Nom states, "sources mainly by one author": I'm not sure what the problem is there, as other sources are also used, particularly when the book by this author (I presume Bolger again) is ''American Pastels in the Metropolitan Museum of Art'' from a major publisher Abrams Books|Harry N. Abrams or, according to the Google listing published by the Museum of Modern Art.http://books.google.com/books?ei=PGRWSZbbB5bCyQTDnvwi&client=safari&id=fKNQAAAAMAAJ&dq=%22american+pastels+in+the+metropolitan%22&q=pastellists#search_anchor There could hardly be a more substantial source. Google Books also shows ample other sources.http://books.google.com/books?as_brr=0&q=%22The+Pastellists%22+%22new+york%22&btnG=Search+Books. This group is part of the historical record of twentieth century art, and |notability is far in excess of wikipedia requirements
Stance: keep
Cited policy: Wikipedia:Notability (WP:N)