New Doubleday Plan for Book Buying and Inventory Control, PW, Feb. 23, 1959, at 46-48.
LEONARD SHATZKIN, PW, Feb. 6, 1961, at 69 (announcing Shatzkin's move from Doubleday to Crowell-Collier to develop a new paperback line, Collier Books).
Recollection from Shatzkin's son.