Ballantine
Wikipedia: https://en.wikipedia.org/wiki/Ballantine_Books
Debate Continues as to the Merits of Paper-Covered Originals, PW, July 12, 1952, at 99-101.
Ballantine Announces Titles, Staff Members, New Address, PW, Sept. 6, 1953, at 912-914.
Ballantine Books, PW, May 30, 1954, at 2219 (increases size of hardbound editions beginning in June 1954).
Ballantine Books, PW, Jan. 14, 1957, at 56 (hardbound editions will be issued a month after the paperbound comes out).
Kable to Distribute Ballantine Books, PW, Oct. 6, 1958, at 23.
Kable Now Handles Entire Ballantine Title List, PW, Mar. 16, 1959, at 34.
Pocket Books to Distribute Ballantine Books, PW, Aug. 12, 1963, at 37.
INTEXT Buys Ballantine Books, PW, Oct. 7, 1968, at 34.
Random Buys Ballantine for $6.4 Million, PW, Jan. 15, 1973, at 39.
Kenneth C. Davis, The Building of Ballantine, PW, Apr. 27, 1984, at 25-29.
Ian and Betty Ballantine Books and Business Records, 1935-1994, bulk 1945-1973, Columbia University, Rare Book & Manuscript Library, https://findingaids.library.columbia.edu/ead/nnc-rb/ldpd_13511438.