Golfing Auction Catalogues: Christie's Origins of Golf 30/5/2012 with Prices Realised, Christie's Gary Player Collection 2002, Bonhams 24/10/2018 Pierre Horwitz Collection Part 1 and Part 2 1/5/2019 both with prices realised, Sotheby's 19/7/1983, 21/7/1986, 21/7/1987, Phillips 23/1/1987, Bonhams Golf 25/8/1989, plus others