Archives: Grove Press Records, 1948-1998, Syracuse University Libraries, Special Collections Research Center, https://library.syracuse.edu/digital/guides/g/grove_press.htm; Grove Press Imprint Collection, University of North Carolina Libraries, Wilson Library Special Collections, https://catalog.lib.unc.edu/?q=%22Grove+Press+Imprint+Collection.%22&search_field=work_entry (collection publication available here: https://library.unc.edu/wilson/rbc/publications/).
Weekly Record note, PW, Sept. 3, 1949, at 1194 (for The Confidence-Man, "First in a projected series of paper-bound editions of out-of-print classics.")
Dell Named Distributor of Grove Press Books, PW, Nov. 28, 1960, at 20-21 (effective Dec. 1, 1960).
Into the Grove series http://www.hilobrow.com/tag/grove-press/page/2/ (high quality cover photos)
Loren Glass, GROVE PRESS, THE EVERGREEN REVIEW, AND THE INCORPORATION OF THE AVANT-GARDE (Stanford UP 2013).
Barney Rosset, ROSSET: MY LIFE IN PUBLISHING AND HOW I FOUGHT CENSORSHIP (OR Books / Counterpoint Press 2016).
Loren Glass, REBEL PRESS: GROVE PRESS AND THE REVOLUTION OF THE WORD (Seven Stories Press 2018).
GROVE PRESS COLLEGE CATALOGS -- 1968, 1970?
A couple pages from 1970 edition: https://www.worthpoint.com/worthopedia/grove-press-college-catalog-1970-1788705100
Collection of Grove miscellany
Covers of the first few dozen hardcovers:
"The Perverse Library" -- mentions lots of Grove books:
Henry W. Sommerville, Dissertation, Commerce and Culture in the Career of the Permanent Innovative Press: New Directions, Grove Press, and George Braziller Inc. (University of Rochester 2009), available at https://urresearch.rochester.edu/institutionalPublicationPublicView.action?institutionalItemId=14076
Lots of great stuff on how smaller presses like ND and GP lived off less popular reprints from larger firms like Knopf and Random House. Around p. 267, discussion of GP entering quality paperback market. Chapter on ND starting at 400 goes into a lot of detail. ND and quality paperbacks starting at 425.